Abortion rights activists celebrate outside the U.S. Supreme Court Monday for a ruling in a case over a Texas law that places restrictions on abortion clinics. Pete Marovich/Getty Images hide caption

toggle caption Pete Marovich/Getty Images

Researchers have long known that exercise is good for the brain. An enzyme produced by muscles might help explain why. Monalyn Gracia/Corbis/VCG/Getty Images hide caption

toggle caption Monalyn Gracia/Corbis/VCG/Getty Images

A Protein That Moves From Muscle To Brain May Tie Exercise To Memory

  • Download
  • <iframe src="https://www.npr.org/player/embed/483245084/483275259" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Younger siblings seem to have an immune advantage as early as 1 month of age, which may help explain where they get the energy to tease older siblings. Rebecca Schortinghuis/Getty Images hide caption

toggle caption Rebecca Schortinghuis/Getty Images

Lonny Shavelson has studied America's experiments with aid in dying. He's now helping patients and doctors in California come to grips with the state's new law. Courtesy of PhotoWords.com hide caption

toggle caption Courtesy of PhotoWords.com

This Doctor Wants To Help California Figure Out Aid-In-Dying

  • Download
  • <iframe src="https://www.npr.org/player/embed/481422813/481667045" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
Jonathan McHugh/Ikon Images/Getty Images

Investors See Big Opportunities In Opioid Addiction Treatment

  • Download
  • <iframe src="https://www.npr.org/player/embed/480663056/481590421" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Joe Palca (left) with Jim Allison (second from right) and friends, circa 1975. Allison has gone on to make landmark discoveries in science, and is still passionate about outlaw country music. Joe Palca/NPR hide caption

toggle caption Joe Palca/NPR

Jim Allison in his lab at the University of Texas MD Anderson Cancer Center in Houston. Scott Dalton for NPR hide caption

toggle caption Scott Dalton for NPR

A Scientist's Dream Fulfilled: Harnessing The Immune System To Fight Cancer

  • Download
  • <iframe src="https://www.npr.org/player/embed/480435066/481433895" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
Frank Rossoto Stocktrek/Getty Images

From Medical Maggots To Stench Soup, 'Grunt' Explores The Science Of Warfare

  • Download
  • <iframe src="https://www.npr.org/player/embed/480146514/480180730" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript