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One of the world's most treasured foods comes from an unlikely source — a sturgeon farm on a kibbutz in northern Israel. The prized sturgeon eggs — or osetra caviar, if you must — fetches a hefty price and has a top-chef following.

A Scripps Institution of Oceanography-led study finds overfishing of spawning areas and environmental conditions are behind the collapse of two important recreational fisheries off Southern California.

In a show of technological wizardry, the robotic explorer Curiosity blazed through the pink skies of Mars, steering itself to a gentle landing inside a giant crater for the most ambitious dig yet into the red planet's past.

Government plays a large role in scientific research through funding. But how does politics get in the way of scientific research and discovery? As part of our continuing series Exploring Ethics wit

"Americans now walk the least of any industrialized nation in the world," says writer Tom Vanderbilt. A reliance on cars combined with a lack of sidewalks means that what started as a push for convenience has become a difficult problem.

Mayor Jerry Sanders joined other officials today as the first of 1,000 electric-vehicle charging stations went online in Balboa Park.

A year ago, the existence of Stuxnet, the world's first cyber superweapon, first emerged. Many experts suspect the U.S. government had at least a hand in its creation. The development and use of offensive cyberweapons may create challenges for a nation's cyberdefenders — and could be a big policy issue in the nascent era of cyberwarfare.

Airs Saturday, September 18, 2010 at 3:30 p.m. on KPBS TV

In chapter nine school ends and Roya takes her university exams. She and Shireen start university and Shireen gets married. Roya notices a change in her friend.

A group of science-minded teenagers around San Diego County got some real world lab experience this summer. KPBS reporter Ana Tintocalis has this report.