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Fernando Rojas has spent his life living by a large lake in central Chile. About seven years ago it began to shrink, and now most of the water is gone. He holds a photo taken when the lake was full.

In Chile, Many Regard Climate Change As The Greatest External Threat

Drought, floods and wildfires are signs that climate change has become a harsh reality for the 17 million people of Chile. Laguna de Aculeo used to be a booming summer playground, but not anymore.

Author Philip Pullman poses with his new book at Oxford's Bodleian Libraries — where he has been known to do research.

Philip Pullman's Realm Of Poetry And Inspiration

Pullman — author of the beloved His Dark Materials trilogy — says poet William Blake's idea of mystical multiple vision, of different ways of seeing, is "absolutely central" to his new book.

This undated photo shows Organovo's 3-D printing machine.

San Diego Company Aims To Create 3-D Printed Liver Transplants

One in five Americans in need of a liver transplant dies on the wait list. San Diego-based Organovo hopes to change that by creating transplantable liver tissue in the lab.

Donald Trump, 'Wrestling A Pig,' And The GOP's Struggle To Reform

The last thing the GOP wants is to be seen as an anti-immigrant, anti-gay and anti-science. The party has vowed to reform since President Obama's re-election, but change is proving hard.

An illustration of NASA's Juno mission to Jupiter.

NASA's Jupiter Probe Sends First Pics Of Planet From Orbit

The color image shows Jupiter's giant red spot and three of its moons: Io, Europa and Ganymede.

San Diego Science After-School Program Celebrates 50 Years

The Elementary Institute of Science is celebrating 50 years of helping kids from all over the county learn to love science.

This 52-million-year-old fossilized tomatillo was found in Patagonia, Argentina, shedding light on the origin of nightshade plants. In this specimen, the slender stalk is preserved, and the former papery and lobed husk is broken at top to reveal the large, fleshy berry underneath — now turned to coal.

52 Million-Year-Old Tomatillo Fossils Rewrite Veggie History

Potatoes, tomatoes and bell peppers belong to the nightshade family. Newly discovered fossils in Patagonia suggest that family started much earlier than believed, perhaps when dinosaurs roamed.

Folic acid in food might not be enough to prevent birth defects, a federal advisory panel says. Thus the recommendation for supplements.

Folic Acid Supplements Still Needed To Prevent Birth Defects

Folic acid is added to enriched grain products to help prevent birth defects. But women may not get enough through food, a federal advisory panel says.

Ponary, Poland, Jews digging a trench in which they were later buried, after being shot. (undated photo)

NOVA: Holocaust Escape Tunnel

Airs Wednesday, April 11, 2018 at 9 p.m. & Sunday, April 15 at 2 p.m. on KPBS TV

Shara Fisler, a 2015 Women's History Month Local Hero Honoree

Women’s History Month Local Hero Shara Fisler Helps Youth Become Scientific Leaders

Women's History Month 2015 Honoree

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