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Airs Wednesdays, Aug. 7 & 14, 2019 at 11 p.m. on KPBS TV

A revelation goes against widely held ideas about how some glaciers work, and it suggests that at least parts of Greenland's ice sheet survived periods of global warming intact.

Oprah, Sheryl Sandberg and Malala Yousafzai lead the list of world changers. But there are a lot of unsung candidates who deserve a shout-out.

The parasitic varroa mite has been wiping out honeybee colonies globally since the late '80s. Now scientists and beekeepers have teamed up to selectively breed bees with a unique, mite-fighting trait.

A series of books published by Melville House gathers together the final interviews conducted with prominent deceased writers and thinkers. Critic Maureen Corrigan reviews the latest in the series.

Scott Weems' book HA! explores the science of when we laugh and why. He describes the part of your brain that's active when you laugh, and the controversy over whether ducks are funnier than chickens.

KPBS recognizes the Beyster Family and Ken Kramer as the 2014 Hall of Fame inductees.

Just about everything that we do in the water makes noise. When we ship goods from country to country, when we explore for oil and gas and minerals, when the military trains with explosives or intense sonar systems -- the noise travels.

In his largest donation to date, San Diego billionaire Conrad Prebys is giving $100 million to the Sanford-Burnham Medical Research Institute.

The wave of mass shootings in the U.S. is renewing a debate over treating gun violence as a public health issue. Congress has stood in the way of federal funding for studying injuries and deaths.