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Watch live: Trump is revoking security clearance of ex-CIA director John Brennan, Sarah Sanders says
Live from a Tornado: How Storm-Chasing Tech Has Evolved
Today, storm chasers are able to bring viewers up-close tornado images in part because of live streaming.
A mysterious particle from a distant galaxy made its way to an observatory in Antarctica01:12
Cheetah 3 is a blind robot that doesn’t need sensors to navigate01:16
'The Meg': Is the terrifying prehistoric shark from Jason Statham's new movie real?03:24
The human factor: What it will take to build the perfect team for traveling to Mars07:42
The devastating California wildfires from space01:07
The most incredible meteor shower of the year is about to light up the night sky01:31