U.S. Rep. Earl Blumenauer (D-Oregon) plans to introduce legislation called the Securing Protections Against Carbon Emissions (SPACE) Tax Act, which would impose new excise taxes on space tourism trips. Space.com reports: "Space exploration isn't a tax-free holiday for the wealthy. Just as normal Americans pay taxes when they buy airline tickets, billionaires who fly into space to produce nothing of scientific value should do the same, and then some," Blumenauer said in a statement issued by his office. "I'm not opposed to this type of space innovation," added Blumenauer, a senior member of the House of Representatives' Ways and Means Committee. "However, things that are done purely for tourism or entertainment, and that don't have a scientific purpose, should in turn support the public good."

The proposed new tax would likely be levied on a per-passenger basis, as is done with commercial aviation, the statement said. "Exemptions would be made available for NASA spaceflights for scientific research purposes," the statement reads. "In the case of flights where some passengers are working on behalf of NASA for scientific research purposes and others are not, the launch excise tax shall be the pro rata share of the non-NASA researchers." There would be two taxation tiers, one for suborbital flights and another for missions that reach orbit. The statement did not reveal how much the tax would be in either case or if the collected revenue would be earmarked for any specific purpose. Such a purpose could be the fight against climate change, if the proposed act's full name is any guide. Blumenauer is concerned about the potential carbon footprint of the space tourism industry once it gets fully up and running, the statement said.

An anonymous reader quotes a report from Ars Technica: Do you ever forget things, like a doctor's appointment or a lunch date? Do you sometimes struggle to think of the right word for something common? Do you ever feel more anxious or irritable than you typically do? Do you ever feel overwhelmed when trying to make a decision? If you answered "no, never" to all of those questions, there's a possibility that you may not actually be human. Nevertheless, you should still talk to a doctor about additional cognitive screenings to check if you have Alzheimer's disease. At least, that's the takeaway from a six-question quiz provided in part by Biogen, the maker of an unproven, $56,000 Alzheimer's drug.

The six questions include the four above, plus questions about whether you ever lose your train of thought or ever get lost on your way to or around a familiar place. The questions not only bring up common issues that perfectly healthy people might face from time to time, but the answers any quiz-taker provides are also completely irrelevant. No matter how you answer -- even if you say you never experience any of those issues -- the quiz will always prompt you to talk with your doctor about cognitive screening. The results page even uses your zip code to provide a link to find an Alzheimer's specialist near you. Biogen says the quiz website is part of a "disease awareness educational program." But it appears to be part of an aggressive strategy to sell the company's new Alzheimer's drug, Aduhelm, which has an intensely controversial history, to say the least. What's the controversial history you may ask? According to Ars, the drug "flunked out of two identical Phase III clinical trials in 2019." A panel of expert advisors for the FDA overwhelmingly voted against approval, yet it still was approved by the FDA on June 7. It also has a list price of $56,000 for a year's supply.

The report goes on to say that the company is basically making up the statistic that "about 1 in 12 Americans 50 years and older" has mild cognitive impairment due to Alzheimer's. Experts say they know of no evidence to back up that statistic and it appears to be a significant overestimate.

Furthermore, two medical experts from Georgetown University said the company's quiz website "appears designed to ratchet up anxiety in anyone juggling multiple responsibilities or who gets distracted during small talk." They added: "Convincing perfectly normal people they should see a specialist, be tested for amyloid plaque, and, if present, assume they have early Alzheimer's is a great strategy for increasing Aduhelm prescriptions... [It] could lead to millions of prescriptions -- and billions of dollars in profit -- for an ineffective and expensive drug."

New Federal Aviation Administration (FAA) rules say astronaut hopefuls must be part of the flight crew and make contributions to space flight safety. That means Jeff Bezos and Sir Richard Branson may not yet be astronauts in the eyes of the US government. The BBC reports: These are the first changes since the FAA wings program began in 2004. The Commercial Astronaut Wings program updates were announced on Tuesday -- the same day that Amazon's Mr Bezos flew aboard a Blue Origin rocket to the edge of space. To qualify as commercial astronauts, space-goers must travel 50 miles (80km) above the Earth's surface, which both Mr Bezos and Mr Branson accomplished. But altitude aside, the agency says would-be astronauts must have also "demonstrated activities during flight that were essential to public safety, or contributed to human space flight safety." What exactly counts as such is determined by FAA officials.

In a statement, the FAA said that these changes brought the wings scheme more in line with its role to protect public safety during commercial space flights. On July 11, Sir Richard flew on-board Virgin Galactic's SpaceShipTwo to the edge of space as a test before allowing customers aboard next year. Mr Bezos and the three other crew members who flew on Blue Origin's spacecraft may have less claim to the coveted title. Ahead of the launch, Blue Origin CEO Bob Smith said that "there's really nothing for a crew member to do" on the autonomous vehicle. Those wishing for commercial wings need to be nominated for them as well. An FAA spokesperson told CNN they are not currently reviewing any submissions.

There are two other ways to earn astronaut wings in the US - through the military or Nasa. However, a glimmer of hope remains for Sir Richard, Mr Bezos and any future stargazers hoping to be recognized as astronauts. The new order notes that honorary awards can be given based on merit -- at the discretion of the FAA's associate administrator. Astronaut wings were first awarded to astronauts Alan Shepard Jr and Virgil Grissom in the early 1960s for their participation in the Mercury Seven program.

The extremes of floods and fires are not going away, but adaptation can lessen their impact. Economist (paywalled): If temperatures rise by 3C above pre-industrial levels in the coming decades -- as they might even if everyone manages to honour today's firm pledges -- large parts of the tropics risk becoming too hot for outdoor work. Coral reefs and the livelihoods that depend on them will vanish and the Amazon rainforest will become a ghost of itself. Severe harvest failures will be commonplace. Ice sheets in Antarctica and Greenland will shrink past the point of no return, promising sea rises measured not in millimetres, as today's are, but in metres.

Six years ago, in Paris, the countries of the world committed themselves to avoiding the worst of that nightmare by eliminating net greenhouse-gas emissions quickly enough to hold the temperature rise below 2C. Their progress towards that end remains woefully inadequate. Yet even if their efforts increased dramatically enough to meet the 2C goal, it would not stop forests from burning today; prairies would still dry out tomorrow, rivers break their banks and mountain glaciers disappear. Cutting emissions is thus not enough. The world also urgently needs to invest in adapting to the changing climate. The good news is that adaptation makes political sense. People can clearly see the need for it. When a country invests in flood defences it benefits its own citizens above all others -- there is no free-rider problem, as there could be for emissions reduction. Nor does all the money come from the public purse; companies and private individuals can see the need for adaptation and act on it. When they do not do so, insurance companies can open their eyes to the risks they are running.

Some adaptation is fairly easily set in place. Systems for warning Germans of coming floods will surely now improve. But other problems require much larger public investment, like that which has been put into water-management in the Netherlands. Rich countries can afford such things. Poor countries and poor people need help, which is why the Paris climate agreement calls for annual transfers of $100bn from rich to poor. The rich countries have not yet lived up to their side of this. On July 20th John Kerry, President Joe Biden's special envoy on climate change, reiterated America's pledge to triple its support to $1.5bn for adaptation in poorer countries by 2024, part of a broader move to increase investment in adaptation and mitigation in developing countries. More such efforts are vital.

Most Americans who haven't been vaccinated against COVID-19 say they are unlikely to get the shots and doubt they would work against the aggressive delta variant despite evidence they do, according to a new poll that underscores the challenges facing public health officials amid soaring infections in some states. AP: Among American adults who have not yet received a vaccine, 35% say they probably will not, and 45% say they definitely will not, according to a poll from The Associated Press-NORC Center for Public Affairs Research. Just 3% say they definitely will get the shots, though another 16% say they probably will. What's more, 64% of unvaccinated Americans have little to no confidence the shots are effective against variants -- including the delta variant that officials say is responsible for 83% of new cases in the U.S. -- despite evidence that they offer strong protection. In contrast, 86% of those who have already been vaccinated have at least some confidence that the vaccines will work.

That means "that there will be more preventable cases, more preventable hospitalizations and more preventable deaths," said Dr. Amesh Adalja, an infectious disease specialist at Johns Hopkins University. "We always knew some proportion of the population would be difficult to persuade no matter what the data showed, (and) a lot of people are beyond persuasion," said Adalja. He echoed Centers for Disease Control and Prevention Director Rochelle Walensky in calling the current surge "a pandemic of the unvaccinated" because nearly all hospital admissions and deaths have been among those who weren't immunized.

An anonymous reader quotes a report from ScienceAlert: [A] team of surgeons has successfully completed the first human implantation in the US of an artificial heart device called the 'Aeson', developed by French company CARMAT. The artificial heart has two ventricular chambers and four biological valves, just like the real organ, and is powered by an external device. Made from "biocompatible materials" including bovine tissue, the artificial heart uses a combination of sensors and algorithms to maintain its pace and keep blood circulating through the body. "We are encouraged that our patient is doing so well after the procedure," says cardiologist Carmelo Milano from the Duke University School of Medicine. "As we evaluate this device, we are both excited and hopeful that patients who otherwise have few to no options could have a lifeline."

The patient in question is 39-year-old Matthew Moore, from Shallotte in North Carolina. Moore was initially due to have heart bypass surgery, but as his condition deteriorated the medical staff started to run out of options; he became so ill that even a regular heart transplant was too risky. Fortunately, he was in the right place: the Aeson device is being tested at Duke University, pending approval from the US Food and Drug Administration (FDA). It's already been given the green light for use by regulators in Europe, after several years of tests in European patients, not all of which have been successful. The artificial heart has been developed specifically to help those whose hearts can no longer pump enough blood through both chambers. It replaces the entire natural heart, although it's not intended to be permanent -- it's designed to be a bridge towards a full heart transplant within six months or so.

An anonymous reader quotes a report from Ars Technica: Just one week after Google's DeepMind AI group finally described its biology efforts in detail, the company is releasing a paper that explains how it analyzed nearly every protein encoded in the human genome and predicted its likely three-dimensional structure -- a structure that can be critical for understanding disease and designing treatments. In the very near future, all of these structures will be released under a Creative Commons license via the European Bioinformatics Institute, which already hosts a major database of protein structures. In a press conference associated with the paper's release, DeepMind's Demis Hassabis made clear that the company isn't stopping there. In addition to the work described in the paper, the company will release structural predictions for the genomes of 20 major research organisms, from yeast to fruit flies to mice. In total, the database launch will include roughly 350,000 protein structures.
[...]
At some point in the near future (possibly by the time you read this), all this data will be available on a dedicated website hosted by the European Bioinformatics Institute, a European Union-funded organization that describes itself in part as follows: "We make the world's public biological data freely available to the scientific community via a range of services and tools." The AlphaFold data will be no exception; once the above link is live, anyone can use it to download information on the human protein of their choice. Or, as mentioned above, the mouse, yeast, or fruit fly version. The 20 organisms that will see their data released are also just a start. DeepMind's Demis Hassabis said that over the next few months, the team will target every gene sequence available in DNA databases. By the time this work is done, over 100 million proteins should have predicted structures. Hassabis wrapped up his part of the announcement by saying, "We think this is the most significant contribution AI has made to science to date." It would be difficult to argue otherwise. Further reading: Google details its protein-folding software, academics offer an alternative (Ars Technica)

Last year the artificial intelligence group DeepMind cracked a mystery that has flummoxed scientists for decades: stripping bare the structure of proteins, the building blocks of life. Now, having amassed a database of nearly all human protein structures, the company is making the resource available online free for researchers to use. From a report: The key to understanding our basic biological machinery is its architecture. The chains of amino acids that comprise proteins twist and turn to make the most confounding of 3D shapes. It is this elaborate form that explains protein function; from enzymes that are crucial to metabolism to antibodies that fight infectious attacks. Despite years of onerous and expensive lab work that began in the 1950s, scientists have only decoded the structure of a fraction of human proteins.

DeepMind's AI program, AlphaFold, has predicted the structure of nearly all 20,000 proteins expressed by humans. In an independent benchmark test that compared predictions to known structures, the system was able to predict the shape of a protein to a good standard 95% of time. DeepMind, which has partnered with the European Molecular Biology Laboratory's European Bioinformatics Institute (EMBL-EBI), hopes the database will help researchers to analyse how life works at an atomic scale by unpacking the apparatus that drives some diseases, make strides in the field of personalised medicine, create more nutritious crops and develop "green enzymes" that can break down plastic.

UnknowingFool shares a report from CBS News: After being down for a month due to a computer issue, Hubble was brought back up last week. NASA released images captured by Hubble over the weekend including a rare observance of two galaxies that are colliding. The other interesting image is that of a spiral galaxy with three arms, as most spiral galaxies have an even number of arms. "I'm thrilled to see that Hubble has its eye back on the universe, once again capturing the kind of images that have intrigued and inspired us for decades," NASA administrator Bill Nelson said in a statement. "This is a moment to celebrate the success of a team truly dedicated to the mission. Through their efforts, Hubble will continue its 32nd year of discovery, and we will continue to learn from the observatory's transformational vision."

turp182 shares a report from USA Today: [T]he UAE is now testing a new method that has drones fly into clouds to give them an electric shock to trigger rain production [...]. The project is getting renewed interest after the UAE's National Center of Meteorology recently published a series of videos on Instagram of heavy rain in parts of the country. Water gushed past trees, and cars drove on rain-soaked roads. The videos were accompanied by radar images of clouds tagged "#cloudseeding." The Independent reports recent rain is part of the drone cloud seeding project.

The UAE oversaw more than 200 cloud seeding operations in the first half of 2020, successfully creating excess rainfall, the National News reported. There have been successes in the U.S., as well as China, India, and Thailand. Long-term cloud seeding in the mountains of Nevada have increased snowpack by 10% or more each year, according to research published by the American Meteorological Society. A 10-year cloud seeding experiment in Wyoming resulted in 5-10% increases in snowpack, according to the State of Wyoming. According to a researcher that worked on the drone initiative, "the aim of the UAE's project is to change the balance of electrical charge on the cloud droplets, causing water droplets to clump together and fall as rain when they are big enough."

The world's largest carbon capture and storage project has failed to meet a crucial target of capturing and burying an average of 80% of the carbon dioxide produced from gas wells in Western Australia over five years. From a report: The energy giant Chevron agreed to the target with the West Australian government when developing its $54 billion Gorgon project to extract and export gas from fields off the WA coast. The five year milestone passed on Sunday. In a statement the energy giant Chevron announced that since operations began in August 2019 it had injected five million tonnes of greenhouse gases underground. According to the independent analyst Peter Milne, that leaves a shortfall of around 4.6 million tonnes, which he estimates would cost about $100 million to offset via carbon credits.

The project has national and even international significance, with the oil and gas industry and the federal government declaring the success of carbon capture and storage to be crucial in tackling climate change while making use of fossil fuels. "It is essential we position Australia to succeed by investing now in the technologies that will support our industries into the future, with lower emissions energy that can support Australian jobs," Prime Minister Scott Morrison said in April while announcing $263.7 million in funding to develop carbon capture and storage technology.

An anonymous reader quotes a report from Ohio State News: Scientists who study glacier ice have found viruses nearly 15,000 years old in two ice samples taken from the Tibetan Plateau in China. Most of those viruses, which survived because they had remained frozen, are unlike any viruses that have been cataloged to date. The findings, published today in the journal Microbiome, could help scientists understand how viruses have evolved over centuries. For this study, the scientists also created a new, ultra-clean method of analyzing microbes and viruses in ice without contaminating it.

The researchers analyzed ice cores taken in 2015 from the Guliya ice cap in western China. The cores are collected at high altitudes -- the summit of Guliya, where this ice originated, is 22,000 feet above sea level. The ice cores contain layers of ice that accumulate year after year, trapping whatever was in the atmosphere around them at the time each layer froze. Those layers create a timeline of sorts, which scientists have used to understand more about climate change, microbes, viruses and gases throughout history. Researchers determined that the ice was nearly 15,000 years old using a combination of traditional and new, novel techniques to date this ice core. When they analyzed the ice, they found genetic codes for 33 viruses. Four of those viruses have already been identified by the scientific community. But at least 28 of them are novel. About half of them seemed to have survived at the time they were frozen not in spite of the ice, but because of it.

An anonymous reader quotes a report from CNBC: Jeff Bezos has heard the complaints about billionaires like himself funneling their money into private rocket companies instead of donating to causes on Earth, and he doesn't disagree. In an interview with CNN ahead of his planned Tuesday morning space voyage in a rocket built by his company Blue Origin, Bezos was asked for his thoughts on critics who call the extraterrestrial flights "joyrides for the wealthy, and [who say] you should be spending your time and your money and energy trying to solve problems here on Earth." "Well, I say they are largely right," said Bezos, who Bloomberg estimates is worth $206 billion. "We have to do both. We have lots of problems here on Earth and we have to work on those."

Bezos and fellow billionaires [...] have been characterized by critics as deaf to issues on the ground and too obsessed with making space more accessible when they could put their resources elsewhere. The 57-year-old Bezos, who earlier this month stepped down as CEO of Amazon, said it's important to "look to the future ... as a species and as a civilization." In his view, the work being done today will lay the foundation for future generations to work in space, which "will solve problems here on Earth." In an opinion piece for MSNBC, Talia Lavin views billionaires going to space through a more incendiary lens, writing: "What they seek to leave behind is a planet burning and flooding and full of the kind of small and ordinary suffering such fortunes could alleviate in an instant."

The space program of the 1960s, which resulted in the first crewed mission to land on the Moon, "may have been mired in the bitter and petty rivalries of the Cold War, and limned by prejudice about who could excel," writes Lavin, "but it was a project funded and created by our government, an achievement held in common by the masses. No such common pride can be held in the launch of the titans of capital."

"In this billionaire battle, there is no pretense at a sense of collective pride or communal achievement. Even the drumbeat of nationalism would be better than this obscene egotism, whose fumes are more putrid than rocket-jet emissions. It feels like a parody of hubris, and a colossal celebration of the social failure to moderate preposterous accumulations of wealth."

Thoughts?

Aerospace companies have launched about 2,000 Internet satellites into orbit around Earth over the past 2 years, nearly doubling the number of active satellites. This has sparked concerns among astronomers and other skygazers, who worry about interference with observations of the night sky. From a report: Now, in what would be the biggest international step yet towards addressing these concerns, diplomats at a United Nations forum next month might discuss whether humanity has a right to 'dark and quiet skies.' The debate could initiate a framework for how scientists and the public would deal with the flood of new satellites -- with many more expected.

Tens of thousands of satellites could be added to Earth orbit in the next few years to provide broadband Internet, if companies and governments build and launch all the networks, or 'megaconstellations,' they have publicly announced. The sheer number of these could mean that hundreds are visible all night long, affecting the sky like never before in human history. "These constellations are changing dramatically the way space has been used," says Piero Benvenuti, an astronomer at the University of Padua in Italy and a former general secretary of the International Astronomical Union (IAU). He and other astronomers have been working through the IAU to raise international awareness of how the megaconstellations are affecting scientists and members of the public. They say the goal is not to pit astronomers against satellite companies, but to develop a vision of how to fairly use the shared realm of outer space.

Another scorching summer heat wave was set to peak across portions of the western United States early this week, with air so dry that rain from thunderstorms evaporated before reaching the ground and smoke from wildfires delayed hundreds of flights at one of the region's largest airports. From a report: Temperatures reached the upper 90s and lower 100s in parts of the Northern Rockies on Monday, and forecasters warned of "dry thunderstorms," which bring lightning that can spark fires, but no rain to quench them. It was the fourth major heat wave to afflict parts of the West since early June, bringing dangerously hot temperatures and helping fuel the deepening drought and exploding wildfires across the region. An excessive heat warning was also in effect for parts of Montana and Wyoming through Thursday, the National Weather Service said.

Glasgow, a town in northern Montana, hit 110 degrees on Monday, the Weather Service said. By 2:45 p.m. local time, Billings, toward the southern portion of the state, was officially hotter than Death Valley, Calif., at 110.4 degrees. Weather officials in Billings took advantage of the toasty temperatures and baked a batch of cookies on the dashboard of a car. "It may have taken 5 hours but we have fully baked cookies," they shared on Twitter. Lander, in central Wyoming, reached a record 100 degrees on Monday, according to the Weather Service. In 130 years, it was only the 21st day in Lander to reach triple digits. Parts of Idaho, including Boise and Twin Falls, saw much needed rain showers.

NPR: Wearing a cowboy hat under the West Texas morning sun, Jeff Bezos crossed the bridge to enter the capsule made by his company Blue Origin. He was accompanied by three others -- his brother Mark Bezos, female aviation pioneer Wally Funk and 18-year-old Oliver Daemen. Then the shuttle hatch closed and just before 9:15 a.m. ET, the four blasted into space on the first human flight on Blue Origin's New Shepard launch vehicle. Bezos is the second billionaire this month to reach the edge of space: Richard Branson rocketed there last week aboard a vessel made by his company Virgin Galactic. The date of the New Shepard's maiden launch is no accident: July 20 was the day in 1969 that Neil Armstrong and Buzz Aldrin landed on the moon. Further reading: 'Mercury 13' pilot Wally Funk carried 60 years of history to space on Blue Origin flight.

An anonymous reader quotes a report from Interesting Engineering: [Researchers at the Indian Institute of Science Education and Research (IISER), Kolkata] along with those at the Indian Institute of Technology (IIT), Kharagpur decided to focus on developing something that is harder than conventional self-healing material, as reported by The Telegraph India. The researchers used a piezoelectric organic material, which converts mechanical energy to electrical energy and vice versa, to make needle-shaped crystals that aren't more than 2 mm long or 0.2 mm wide, according to the experimental results which were published in the journal Science. Due to their molecular arrangement in the specially designed crystals, a strong attractive force developed between two surfaces. Every time a fracture occurred, the attractive forces joined the pieces back again, without needing an external stimulus such as heat or others that most self-healing materials would need.

"Our self-healing material is 10 times harder than others, and it has a well-ordered internal crystalline structure, that is favored in most electronics and optical applications," lead researcher Professor Chilla Malla Reddy of IISER said. "I can imagine applications for an everyday device," said Bhanu Bhushan Khatua, a member of the team from IIT Kharagpur." Such materials could be used for mobile phone screens that will repair themselves if they fall and develop cracks."

fahrbot-bot shares a report from Live Science: Imagine a universe where you could point a spaceship in one direction and eventually return to where you started. If our universe were a finite donut, then such movements would be possible and physicists could potentially measure its size. "We could say: Now we know the size of the universe," astrophysicist Thomas Buchert, of the University of Lyon, Astrophysical Research Center in France, told Live Science in an email.

Examining light from the very early universe, Buchert and a team of astrophysicists have deduced that our cosmos may be multiply connected, meaning that space is closed in on itself in all three dimensions like a three-dimensional donut. Such a universe would be finite, and according to their results, our entire cosmos might only be about three to four times larger than the limits of the observable universe, about 45 billion light-years away.

18-year-old Oliver Daemon will become the youngest person ever to travel to space as the fourth passenger on Blue Origin's first crewed mission this week to the edge of outer space (flying with Jeff Bezos, his brother Mark, and 82-year-old aviator Wally Funk).

The Atlantic calls it "a rather unusual bunch": When they take off on Tuesday, they will each fulfill a personal dream, but as a crew, they're making history: No group like this one has ever gone to space together before. Even the participants of the most diverse missions to the International Space Station have had far more in common with one another than this quartet. They were all professional astronauts, with comparable ages, educational backgrounds, and even temperaments, given that potential astronauts must undergo psychological screenings before getting the job. The motley crew of Blue Origin's first passenger flight seems closer to a cast of offbeat characters gathered together for a zany adventure: If The Breakfast Club had the brain, the jock, the basket case, the princess, and the criminal, this Blue Origin flight has the boss, the tag-along, the real deal, and the kid...

Blue Origin has conducted 15 test flights of the New Shepard rocket, but has never before flown the vehicle with people on board.

Of the passengers on Bezos's debut flight, Daemen might be the most unexpected pick. In fact, Daemen wasn't supposed to be on this flight. Blue Origin had held an auction for one of the seats on the flight, culminating in a top bid of a whopping $28 million. But the company said today that the winner, whose name has not been disclosed, decided to skip this particular flight and go later, citing "scheduling conflicts," so the company slotted in Daemen, a soon-to-be physics student at Utrecht University, in the Netherlands. (Blue Origin said the teen was "a participant in the auction," but did not disclose how much the seat cost.)

Daemen and Funk, as Blue Origin pointed out in its announcement, "represent the youngest and oldest astronauts to travel to space." But describing them by age alone elides the very different journeys they have taken to reach this point. Funk is an aviation legend who underwent more difficult tests than John Glenn, the first American to orbit the Earth, had to, and has waited 60 years for this moment. Daemen is a teenager who took a gap year to get his pilot's license, and the son of a private-equity executive... Daemen represents a new class of spacefarers; in the coming years, as private companies such as Blue Origin, Richard Branson's Virgin Galactic, and Elon Musk's SpaceX make people into astronauts more readily than government agencies like NASA can, the distance between a childhood dream and reality is bound to shrink. Expect more smorgasbord space crews like the Blue Origin one, filled with an assortment of very wealthy individuals and the people they choose to go with them...

The rules about who can become an astronaut have changed, and the new "right stuff" is money and luck.

Slashdot reader sciencehabit shares news from Science magazine: When a giant space rock struck the waters near Mexico's Yucatán Peninsula 66 million years ago, it sent up a blanket of dust that blotted out the Sun for years, sending temperatures plummeting and killing off the dinosaurs. The impact also generated a tsunami in the Gulf of Mexico that some modelers believe sent an initial tidal wave up to 1500 meters (or nearly 1 mile) high crashing into North America, one that was followed by smaller pulses.

Now, for the first time, scientists have discovered fossilized megaripples from this tsunami buried in sediments in what is now central Louisiana.

"It's great to actually have evidence of something that has been theorized for a really long time," says Sean Gulick, a geophysicist at the University of Texas, Austin. Gulick was not involved in the work, but he co-led a campaign in 2016 to drill down to the remains of the impact crater, called Chicxulub... Cores from the 2016 drilling expedition helped explain how the impact crater was formed and charted the disappearance and recovery of Earth's life. In 2019, researchers reported the discovery of a fossil site in North Dakota, 3000 kilometers north of Chicxulub, that they say records the hours after the impact and includes debris swept inland from the tsunami.

"We have small pieces of the puzzle that keep getting added in," says Alfio Alessandro Chiarenza, a paleontologist at the University of Vigo who was not involved with the new study. "Now this research is another one, giving more evidence of a cataclysmic tsunami that probably inundated [everything] for thousands of miles."