Science Friday Folgen

Everything You Want To Know About COVID-19 Vaccines The U.S. has been vaccinating people against COVID-19 for a little over a month. While there have been plenty of hiccups, over 20 million people in the country have received at least one dose of either the Pfizer-BioNTech or the Moderna shots. For the past few weeks, Science Friday has been collecting your questions about the COVID-19 vaccines on the SciFri VoxPop App—and we heard from a lot of listeners. The questions and concerns ranged from if people with antibodies should get vaccinated to if the vaccines are safe for pregnant women. Joining Ira to tackle these listener questions is Benhur Lee, professor of microbiology at the Icahn School of Medicine at Mount Sinai in New York City.   How Scientists Unravel The Mysteries Of The Placenta Here’s a fun fact for your next virtual trivia night: What’s the only organ that we can grow temporarily, and discard after it’s been used? The answer: the placenta. It may be a disposable organ, but scientists have a tricky time studying it: You can’t poke at it, sample it, or pull it out to see how it works while it’s doing its job of growing a human baby. In an effort to understand how this squishy, purplish, pancake-shaped organ performs some of its most important functions, researchers have had to turn to creative techniques. Ann-Charlotte Iverson, professor at the Norwegian University of Science and Technology, and Nicholas Heaton, assistant professor at Duke University, join Science Friday to discuss how the placenta protects a fetus from viral infection and inflammation, and what happens when something goes wrong.   A New President, A New Climate Policy When President Biden was running for office, he campaigned on re-entering the Paris climate accords his first day in the White House. He followed through shortly after being sworn in. But in the week that followed, the new President has also taken additional steps focused on reducing carbon emissions and adapting to the changing climate—like a push to move the government vehicle fleet to electric vehicles, establishing a White House Office of Domestic Climate Policy, and pausing oil and gas exploration leases on federal lands. Sophie Bushwick, technology editor at Scientific American, joins Ira to talk about Biden’s climate moves, as well as other stories from the week in science, including a study of global ice loss, a halt to Merck’s COVID-19 vaccine trials, and a question about the aquatic habits of an ancient dinosaur. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

Orange Is The New Black—For Bats For a newly-described bat from West Africa, dubbed Myotis nimbaensis (mouse-eared bat from the Nimba Mountains), scientists are reaching for a different part of the color wheel. While Myotis does have some black on its body, the overwhelming majority of the bat’s fur is bright orange.   A team of scientists from the American Museum of Natural History and Bat Conservation International stumbled on the new species while surveying populations of another endangered bat in the Nimba Mountains. It lives in abandoned mine tunnels in the northern part of the mountain range. As those aging tunnels are beginning to collapse, the researchers are working to build new bat-tunnels to help preserve the threatened species.   Winifred Frick, chief scientist of Bat Conservation International, joins SciFri director Charles Bergquist to discuss the new species, and what’s being done to help protect it. Greenland’s Microbial Melt-Down The Greenland ice sheet covers nearly 700,000 square miles—three times the size of Texas. The ice sheet is estimated to have lost nearly 4 trillion tons of ice in the past three decades. A team of researchers recently investigated how the bacteria in the sediments on the ice sheet could be contributing to the melting of the ice. Their results were published in the journal Geophysical Research Letters.  Producer Alexa Lim talks to glaciology Asa Rennermalm about how the mix of bacteria and sediments can darken the ice, impacting how the ice sheet melts. Life Of A Coronavirus Scientist During A Pandemic Unfortunately, we’ve arrived at a grim pandemic milestone: One full year of a global health crisis. The first COVID-19 cases were reported in December 2019 by the Wuhan Municipal Health Commission.  Last spring, we talked with three coronavirus researchers—Matthew Frieman, Andrea Pruijssers, and Lisa Gralinski—who discussed what the pandemic was like for them, including working in a BSL3 biosafety lab, and how their lives, and research, had been impacted. Ira checks back in with one of them, Matthew Frieman, to reflect on his experience in the last year, and what he expects for the coming year.  Searching For Extraterrestrial Life Like ‘Sherlock Holmes’ Back in October 2017, our solar system received a strange visitor, unlike any seen before. Scientists couldn’t decide if it was an asteroid, a comet, or an ice chunk. To this day, it’s simply classified as an “interstellar object,” dubbed ‘Oumuamua.’ For his part, Harvard astrophysicist Ari Loeb is pretty sure what it is. It’s so hard to classify, he reasons, because it’s a byproduct of intelligent life outside our solar system. But how it found its way here is anyone’s guess. In his new book Extraterrestrial: The First Sign of Intelligent Life Beyond Earth, Loeb wants you to take the possibility of aliens seriously. He joins Ira to talk about his theory, how an early love of philosophy shaped his views as an astrophysicist, and why searching for extraterrestrial life is a little like being Sherlock Holmes.  Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

After Flint’s Crisis, An Algorithm Helps Citizens Find Lead Pipes It’s been nearly seven years since the beginning of Flint, Michigan’s water crisis, when high levels of lead from corroded lead pipes led to water shortages and health issues for city residents. Since then, many other cities around the country have had their own problems with lead. Researchers estimate that millions of Americans are living with pipes that need to be replaced. As Wired reported earlier this month, Toledo, Ohio is one of the latest cities trying to get ahead of its legacy of lead plumbing, with the help of an algorithm created by University of Michigan researchers. The model was originally created to help the city of Flint more quickly—and less expensively—target which homes were most likely to need their pipes replaced. The same researchers are now working as a private company, called BlueConduit, to help other cities do the same work. And in Toledo, they’re working in close partnership with the city and community organizations. Ira talks with University of Michigan professor and BlueConduit co-founder Eric Schwartz, and Alexis Smith of the nonprofit Freshwater Future, about the work ahead for Toledo, and why deploying an algorithm effectively depends on community trust and input. Curious if your own water pipes contain lead? EPA-funded project Crowd The Tap has a free tutorial for finding your water service line—and determining the materials of your pipes. The organization’s mission is to ensure safe drinking water in the United States. By sharing what you observe, you can help identify areas for tap water testing and infrastructure replacement. Learn about your pipes, and how you can help at CrowdTheTap.org. Former Michigan Governor, Other Officials Charged for Flint Water Crisis In Flint, criminal and civil cases stemming from the city’s lead tainted drinking water crisis are converging this week. New criminal charges may be coming while many in Flint still question whether they will ever get justice. Nearly seven years ago, government leaders here pushed the button that switched the city of Flint’s drinking water source from Detroit’s water system to the Flint River. The intent was to save money. The result was a complete disaster. Improperly treated river water damaged pipes, which then released lead and other contaminates into the city’s drinking water. Eighteen months later the water was switched back, but the damage was done. Blood lead levels soared in young children. People were forced to use bottled water for drinking and washing clothes. The city was forced to rip out thousands of old pipes. While testifying about the Flint water crisis before Congress in 2016, former Governor Rick Snyder acknowledged the mistakes. “Local, state and federal officials, we all failed the families of Flint,” Snyder told a congressional committee. Snyder was not among the 15 state and local government officials who faced criminal charges for their handling of the crisis. Half of them pled guilty to lesser charges in exchange for no jail time. And in 2019, Michigan’s new Attorney General dropped charges against the remaining defendants citing problems with the original investigation. The investigation seemed over. Until Tuesday, when the Associated Press reported that several former government officials, including former Governor Snyder, would be facing new charges. If that happens, legal experts say it would be a difficult case for prosecutors. Read more at sciencefriday.com. How Soil Could Save The Planet There’s a scene in the 2014 film Interstellar that imagines the hypothetical impact of climate change on Earth’s food system. The film takes place in a dystopian future where a global crop blight is slowly rendering the planet uninhabitable. Corn is the last viable crop and dust storms threaten humanity’s survival. But it’s not just science fiction. Scientists are warning that if we don’t adopt more sustainable farming practices we’ll deplete the soil of vital nutrients and actually accelerate climate change. The Earth’s soils contain about 2,500 gigatons of carbon—that’s more than three times the amount of carbon in the atmosphere and four times the amount stored in all living plants and animals. And the soil—in union with the plants that grow on and in it—may have an unlimited capacity to suck CO2 out of the air and store it underground. Tom Newmark, founder of The Carbon Underground, joins Ira to discuss the potential of carbon sequestration through a farming technique called “regenerative agriculture.” And Diana Wall, professor of biology at Colorado State University, discusses the role microbes play in the carbon cycle. President Biden Makes Immediate Changes To U.S. Science Policy This week’s peaceful transition of power from one administration to another was a win for democracy, but it was also a win for science. Among his first acts in the Oval Office, President Biden signed executive orders allowing the U.S. to rejoin the Paris Climate Agreement and the World Health Organization, and put the brakes on plans for the Keystone XL pipeline and drilling in the arctic national wildlife refuge. And there will be more policy changes to come, as the president considers signing a new set of orders designed to ramp up U.S. COVID vaccination efforts in the coming days and weeks. Umair Irfan, staff reporter for Vox, discusses the major science policy news of the week. Plus, an update on new variants of SARS-CoV-2 and what scientists have discovered about coronavirus immunity. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.