Science Friday

Science Friday and WNYC Studios
Science Friday

Covering the outer reaches of space to the tiniest microbes in our bodies, Science Friday is the source for entertaining and educational stories about science, technology, and other cool stuff.

  1. Ancient Iguanas Floated 5,000 Miles Across The Pacific | A Pregnant Ichthyosaur Fossil

    1 DAY AGO

    Ancient Iguanas Floated 5,000 Miles Across The Pacific | A Pregnant Ichthyosaur Fossil

    Millions of years ago, iguanas somehow got from North America to Fiji. Scientists think they made the trip on a raft of fallen vegetation. Also, the marine reptile’s fossilized fetus is cluing paleontologists into the lives of ancient sea creatures. Ancient Iguanas Floated 5,000 Miles Across The PacificIf you picture iguanas, you might imagine them sunbathing on hot sand in the Caribbean or skittering around the Mojave Desert. But far, far away from where these iguanas are found is another group of iguanas living on the islands of Fiji and Tonga in the South Pacific—closer to New Zealand than the Americas. And it raises the question: How in the world did these iguanas end up all alone, on the other side of the ocean? In a study published in Proceedings of the National Academy of Sciences in March, scientists suggest that millions of years ago, iguanas hitched a ride on a raft and accidentally sailed all the way across the ocean before washing ashore and starting a new life. Host Flora Lichtman discusses the iguanas’ intrepid adventure with lead author Dr. Simon Scarpetta, evolutionary biologist and assistant professor at the University of San Francisco in California. Meet Fiona, The Pregnant Icthyosaur FossilIn the Patagonia region of Chile, Torres del Paine National Park is a graveyard of ichthyosaurs—ancient, dolphin-like reptiles that roamed the oceans when dinosaurs dominated the land. Nearly 90 of these giant reptiles’ fossils have been found amongst the glaciers. But the standout in the bone heap is Fiona, an ichthyosaur that lived 131 million years ago. She’s in pristine condition, the only fully preserved ichthyosaur in Chile. And, she died pregnant. She’s teaching paleontologists about the evolution of her species. And some of those findings were recently published in the Journal of Vertebrate Paleontology. Host Flora Lichtman talks with lead author Dr. Judith Pardo-Pérez, paleontologist at the University of Magallanes in Chile. Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

    19 min
  2. How Death Metal Singers Make Their Extreme Vocalizations | Regional Allergies

    6 DAYS AGO

    How Death Metal Singers Make Their Extreme Vocalizations | Regional Allergies

    Being able to belt out a tune like Adele or Pavarotti is not just about raw talent. The best singers in the world have to work on their technique—like how to control their breath and develop the stamina to hit note after note for a two-hour concert. But pop stars and opera singers aren’t the only vocalists who have figured out how to harness their voices for maximum impact. Death metal vocalists also train their voices to hit that unique guttural register. And those iconic screams are not as easy to master as they might seem. Vocal scientists at the University of Utah are now bringing death metal singers into the lab to try to understand how they make their extreme vocalizations. What they’re finding is not only insightful for metalheads, but might also help improve treatment for people with some types of vocal injuries. Host Flora Lichtman talks with Dr. Amanda Stark, speech pathologist and vocology researcher at the University of Utah, and Mark Garrett, vocal coach and lead singer of the band Kardashev. Read the whole story at sciencefriday.com. Also, we share a follow-up to our story about seasonal allergies based on a listener’s question about her family’s allergies. Transcripts for each segment will be available after the show airs on sciencefriday.com.     Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

    22 min
  3. A Precisely Pointed Laser Allows People To See New Color ‘Olo’

    28 APR

    A Precisely Pointed Laser Allows People To See New Color ‘Olo’

    Researchers isolated one kind of cone in the eye and aimed lasers at it to allow subjects to see a super vibrant teal shade they call “olo.” Think about the colors of the world around you—the blue of a cloudless sky, the green of a new leaf, the blazing red of a tulip’s petals. We see these colors because of the way our eyes work. But what if we could change how our eyes respond to light, and present them with light in a form they’d never encounter in the natural world? What would we see? This week, researchers reported in the journal Science Advances that by using precisely aimed laser light, they were able to selectively target just one of the three types of color-sensing cones in the human retina. The cone, dubbed “M” because it responds to medium wavelengths of light, is normally stimulated at the same time as cones that respond to longer wavelength reddish light, or shorter wavelength bluish light. But after mapping the location of the cones in several subjects’ eyes, the researchers were able to target just the M cones with one specific wavelength of green laser light—a condition that would never exist in nature. The result, they say, is a highly saturated bluish-green teal color unlike anything in the real world. The researchers named their new color “olo.” Study author James Fong, a computer science PhD student at University of California Berkeley, and his advisor, Dr. Ren Ng, join Host Flora Lichtman to talk about the project, and the possibility of expanding the limits of human color perception. Transcript for this story will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

    19 min

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Covering the outer reaches of space to the tiniest microbes in our bodies, Science Friday is the source for entertaining and educational stories about science, technology, and other cool stuff.

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