Paul Rider runs on Mulholland Drive in Los Angeles, March 25, 2011. Researchers say a moderate running regimen is actually beneficial for the joints of people with healthy knees. Dennis J. Provost for NPR hide caption

toggle caption
Dennis J. Provost for NPR

Put Those Shoes On: Running Won't Kill Your Knees

  • Download
  • <iframe src="https://www.npr.org/player/embed/134861448/134916918" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

How To Dress For Space Travel

  • Download
  • <iframe src="https://www.npr.org/player/embed/134855907/134855879" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Richard Feynman Is The 'Quantum Man'

  • Download
  • <iframe src="https://www.npr.org/player/embed/134855903/134855878" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

How Do You Really Feel? Your Computer May Know

  • Download
  • <iframe src="https://www.npr.org/player/embed/134855899/134855877" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Drilling To The Mantle Of The Earth

  • Download
  • <iframe src="https://www.npr.org/player/embed/134855888/134855876" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Hunting For Traces Of America's First Inhabitants

  • Download
  • <iframe src="https://www.npr.org/player/embed/134855884/134855875" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Did Ancient Eruptions Form Life's Building Blocks?

  • Download
  • <iframe src="https://www.npr.org/player/embed/134855880/134855874" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Stone artifacts dating back 15,500 years suggest humans may have arrived 2,000 years earlier than previously thought. Courtesy of Michael R. Waters hide caption

toggle caption
Courtesy of Michael R. Waters

Texas Find Turns Back Clock On Settlers In America

  • Download
  • <iframe src="https://www.npr.org/player/embed/134832701/134845066" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Deception, Sex, Aeration: The Secret Life Of Orchids

  • Download
  • <iframe src="https://www.npr.org/player/embed/134658896/134658873" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Camouflaging Red Blood Cells For Transfusion

  • Download
  • <iframe src="https://www.npr.org/player/embed/134658884/134658870" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Update On Japan's Nuclear Reactors

  • Download
  • <iframe src="https://www.npr.org/player/embed/134658874/134658868" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

A fluorescence micrograph of HeLa cells, derived from cervical cancer cells taken from Henrietta Lacks and named in her honor Tomasz Szul/Visuals Unlimited, Inc./Getty Images hide caption

toggle caption
Tomasz Szul/Visuals Unlimited, Inc./Getty Images

Tracing The 'Immortal' Cells Of Henrietta Lacks

  • Download
  • <iframe src="https://www.npr.org/player/embed/134622044/134622352" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript