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American 15-year-olds continue to turn in flat results in a test that measures students' proficiency in reading, math and science worldwide, failing to crack the global top 20.

The orbital probe will study how the solar wind interacts with the red planet's thin atmosphere.

Airs Tuesday, February 17, 2015 at 8 p.m. on KPBS TV

The advice for avoiding Zika virus: Don't get bitten by mosquitoes in countries where the virus is spreading. So which repellents work — and which don't?

There might be snakes and hyenas to scare off with a stick. And a swollen creek to cross.

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

The folks at Guinness have a polite request: Don't slurp the foamy head off their beer. It's essentially a nitrogen cap, they say, that's protecting the flavors underneath from being oxidized.

Members of an isolated Amazonian tribe carry the most diverse collection of bacteria ever seen in humans, according to a new study.

More than 330 million Indians are desperate for water, leading some to rely on an ancient — and unproven — method to find it underground.

President Bashar Assad's election victory is another sign that exiled Syrian activists may never safely go home. One activist compares it to the fate of the time-traveling, British TV cult hero.