Broadcasts

A sand dune is much more than just a big pile of sand. But how do sand dunes work, and what else do scientists want to know about sand? Plus, candles, hairstyling products, and other common items can produce toxic air pollution that lingers in our homes. And, former CDC scientist Demetre Daskalakis left his post, citing political interference and a lack of science in decision-making at the agency.

Archaeologists are taking another look at tattoos on preserved corpses and verifying ancient techniques with modern tattoo artists. Plus, an ER doctor reflects on Hurricane Katrina, 20 years later. And, we’re pulling a few of our favorite stories about the science of ice cream out of the freezer.

Humans drove wolves nearly to extinction in the American West. Reintroducing them in 1995 was, and still is, controversial. Plus, the FDA and HHS plan to eliminate petroleum-based food dyes as part of the MAHA agenda. What does science say about their effects on health? And, astronomers found a supernova whose lighter outer layers had been stripped away, revealing an inner shell rich in silicon and sulfur.

This year marks the 100th anniversary of two papers that sparked the field of quantum mechanics. Plus, a science journalist documents his quest to understand his own cluster headaches in the new book “The Headache.” And, what the cancelation of nearly $500 million in funding means for the future of mRNA vaccine research.

Solar power adoption has been rising fast. Amid recent federal efforts to limit clean energy, will it make a dent in our climate impact? Plus, the mechanisms behind Alzheimer’s disease have eluded scientists for decades. But a new breakthrough points to lithium as a possible explanation. And, Dr. Masao Tomonaga was 2 years old when the US bombed Nagasaki. Eighty years later, he reflects on a lifetime of treating other survivors.

A workout can be a mental health boost—or a psychological strain. Two exercise researchers discuss what physical activity does to your mind. Plus, in a new book, mathematician Adam Kucharski traces our relationship to truth from the ancient Greeks to our AI reality. And, a researcher who studies the effects of extreme cold on the body throws a few drops of icy water on cold plunges.

Newly released images from the Parker Solar Probe are so detailed that scientists can see explosions and the flow of solar winds. Plus, menopause research began in earnest about 30 years ago. Two experts want you to know that we’ve actually learned a lot—and it’s not all bad. And, how fast did dinosaurs run? A longstanding equation for dino speed may be wrong.

Across the country, premiums are rising and home insurers are pulling out of markets that are most at risk for climate change-fueled disasters. Plus, the New World Screwworm is creeping north, threatening cattle in Mexico and the US. And, a new book explores the poisonous concoctions in Agatha Christie’s murder mysteries and the science behind how they kill.

A century after a teacher went on trial for teaching evolution, the role of science in the classroom and in society remains in contention. Plus, tick seasons are getting worse, raising concerns about the risk of Lyme disease. Dogs can get vaccinated for it. Why can’t humans? And, as disasters escalate, what’s the future of FEMA?

In this archival show, undersea archaeologist Robert Ballard shares adventures from beneath the waves and his love for deep-sea exploration. Plus, research suggests that we share parts of our microbiome with people in our social networks beyond family members. And, a book uses science and the benefit of hindsight to figure out how to survive some of history’s biggest disasters.