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The skin of the golden poison dart frog, Phyllobates terribilis, secretes a deadly poison that might lead to a better understanding of how to treat malfunctions of the human nervous system.

Chemists Re-Create Deadly Frog Poison In The Lab

The toxin comes from tiny frogs in Colombia — the ones that pack a punch on the tip of poison darts. In the past, research on toxins like this has led to some pretty amazing drug discoveries.

Hummingbird wings beat at up to 80 times a second, giving them the ultimate control in the air, Ecuador.

SUPERNATURE - WILD FLYERS

"Crowded Skies" airs Wednesday, Dec. 18, 2019 at 10 p.m. on KPBS TV + Sunday, Dec. 22 at 10 p.m. on KPBS 2

Doctor's Book Presents The Case Against 'Dairy Crack'

Physician Neal Barnard argues that cheese is unhealthy and addictive. Anthropologist Barbara J. King takes a look at Barnard's provocative new book.

Power Of Sour: How Tart Is Reclaiming Turf From Sweet

Americans once made sour drinks like shrubs and switchels and preferred tart strawberries and cherries. Then sugar became cheaper and ubiquitous. Now sour is returning in fermented foods and drinks.

Petra. Drawing inspiration from Egyptian, Assyrian and Hellenstic architecture, many of these facades show ornate architectural features and intricately carved details.

NOVA: Petra - Lost City Of Stone

Airs Wednesday, Nov. 11, 2020 at 9 p.m. on KPBS TV (not available to stream on demand)

District Attorney Bonnie Dumanis speaks to the media, Aug. 20, 2013.

San Diego District Attorney Bonnie Dumanis To Step Down In July

San Diego County District Attorney Bonnie Dumanis announced Thursday she is resigning in July. The district attorney said she is being encouraged to run for the San Diego County Board of Supervisors.

Searching For 'Facebook Customer Service' Can Lead To A Scam

Say you got kicked off Facebook and need to get back on — to talk to friends or run your small business. A Google search for "Facebook customer service" can lead to a surprise. A bad one.

Parents and educators hold signs reading, "Save Our Schools," at a San Diego Unified School Board meeting, Feb. 21, 2017.

San Diego Unified Budget Cuts Spare Classrooms But Not Their Frequent Visitors

Class sizes are expected to remain the same despite a $124 million deficit next year. But many of the cuts impact administrators and specialists who are familiar faces in the classroom.

An illustration from 1875 depicts the survivors of the frigate <em>Cospatrick</em>, which caught fire off South Africa's Cape of Good Hope in November 1874. Of more than 470 people on board, just three ultimately survived, and they <a href="http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10382697">were reduced to cannibalism</a>.

Cannibalism: It's 'Perfectly Natural,' A New Scientific History Argues

It's gruesome, but from a scientific standpoint, there's a predictable calculus for when humans and animals go cannibal, a new book says. And who knew European aristocrats ate body parts as medicine?

Then-Secretary of State Madeleine Albright and North Korean leader Kim Jong Il toast in Pyongyang on Oct. 24, 2000. The U.S. and North Korea signed an agreement six years earlier to curb North Korea's nuclear activities in exchange for aid, but it collapsed in 2002, during the Bush administration.

Will Iran Deal Meet The Same Fate As A Past U.S.-North Korean Arms Deal?

If Trump keeps his promise to do away with the Iran deal, it won't be the first time a Republican administration drops an arms deal inked by Democrats. Something similar happened under George W. Bush.

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