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Neanderthal depiction. Why did the Neanderthals die away while Homo sapiens survived? Follow our ancestors’ footsteps out of Africa along a trail of fresh scientific clues to help unravel the mystery of how we got where we are.

Airs Wednesday, Feb. 27, 2019 at 10 p.m. on KPBS TV + Sunday, March 3 at 9 p.m. on KPBS 2

December brought storm clouds to the Porter Ranch neighborhood in Southern California's San Fernando Valley.

Families Near The Huge Gas Leak Wonder: Is Home A Safe Place To Be?

Most health officials say the small amounts of benzene and other components of the natural gas still leaking in Southern California are probably not a health threat. Still, some parents worry.

Workers harvest autumn flush teas on a tea estate in Darjeeling, India. Autumn is the personal favorite flush of many of India's most discerning tea tasters, though these teas remain largely unknown and nearly impossible to find.

Autumn Flush: The Best Darjeeling Tea You'll (Likely Never) Taste

Darjeeling is the "Champagne of teas," sold by distinct harvest season, or flush. But while many of India's top tea experts point to the autumn flush as their favorite, those teas are largely unknown.

Congress Urging San Diego High School Students To Develop Mobile App For STEM Contest

Congress wants to hear from tomorrow's innovative leaders today. That's why representatives have launched the first annual "Science, Technology, Engineering and Math" -- or "STEM" competition for high school students.

Rigoberto Ortiz, who died in the Arizona desert, stands in this undated photograph.

Death At The Border: A Brother's Fatal Journey Inspires Altruism

After his brother died in the Arizona desert, a Fallbrook immigrant started a nonprofit to search for dead or dying migrants at the U.S.-Mexico border.

10 San Diego Shops To Visit On Independent Bookstore Day

Saturday is Independent Bookstore Day. Here's where San Diegans can get their literary fix.

'A Hundred Thousand Worlds' Might Be A Few Too Many

Bob Proehl's sprawling novel follows actor Valerie and her son Alex on an epic road trip, punctuated by stops at comic conventions. It's a charming but messy debut that crams in too many ideas.

Make mine a venti: An example of a drinking vessel from the Grasshopper Pueblo archaeological site in central Arizona. Researchers tested shards of similar vessels found at various sites in the American Southwest and found evidence that people in the region were drinking caffeinated cacao and yaupon holly drinks 1,000 years back.

1,000 Years Ago, Caffeinated Drinks Had Native Americans Buzzing

Ancient people in the American Southwest and Mexican Northwest were drinking cacao and tea-like yaupon in places where neither grew. That suggests an extensive trade network to deliver a caffeine fix.

David Pogue and Prof. Friederike Range (University of Vienna) test whether dogs have a sense of fairness.

NOVA scienceNOW: What Are Animals Thinking?

Airs Wednesday, November 7, 2012 at 10 p.m. on KPBS TV

Northeast Baptist Hospital, one of five hospitals within the Baptist Health System in San Antonio.

Health System Took Control To Make Joint Replacement More Profitable

Baptist Health System in San Antonio made money doing what used to be industry heresy: reducing patients' use of medical care.

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