The National Institutes of Health stopped conducting invasive biomedical research with its hundreds of chimps in 2015. It has been slowly moving the animals to Chimp Haven, a sanctuary for chimps in Louisiana since then. Nell Greenfieldboyce, NPR science correspondent joins the program to discuss the NIH’s efforts to retire research chimps.

Nell’s report on chimp retirement is available:, and

Send an email to

This episode was edited and produced by Gisele Grayson. Katherine Sypher verified the facts. Stu Rushfield was the audio engineer.

Gisele Grayson edited the story, Chloee Weiner produced it, and Kathrine Sypher fact-checked it. Our audio engineer was Stu Rushfield.