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PBS News Hour

What scientists hope to learn from asteroid sample

You may have heard about a NASA probe that successfully brought some samples from a deep-space asteroid back to Earth. It took four billion miles to get them, but researchers believe it will be worth it. You also may be wondering just why scientists want these samples from what's essentially a huge rock flying through space. Science correspondent Miles O'Brien explains.

California News
SFPD deputy chief says police can’t ‘sit by’ and watch ICE agents get hurt
SFPD deputy chief says police can’t ‘sit by’ and watch ICE agents get hurt
Police department’s role is to be a ‘peacekeeper’ between ICE agents and protesters
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Troops, terror and tears in Los Angeles as Ice raids show no sign of slowing
Troops, terror and tears in Los Angeles as Ice raids show no sign of slowing
Raids have left residents of LA’s MacArthur Park scared to go to trusted local businesses – and outside in general
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California’s wind and solar projects face new federal hurdles
California’s wind and solar projects face new federal hurdles
Clean-energy projects have new deadlines for federal tax credits and limits on foreign parts, taking aim at California’s climate agenda. Eleven major solar projects and one onshore wind project now face potential delays or cancellation.
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The LA Olympics are 3 years away. Here's a first look at the schedule
The LA Olympics are 3 years away. Here's a first look at the schedule
Los Angeles is officially three years out from the Olympic Games and to mark the occasion, organizers on Monday released a preview of the competition schedule.
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