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FAA grounds all U.S. flights after air traffic control system becomes 'overwhelmed'

National ground stops of this kind are exceedingly rare

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NASA's Chandra finds the likely cause of a giant star's mysterious outbursts. X-rays point to a hidden black hole or neutron star companion pulling material away every 113 days

Study Shows a Single Nuclear Blast Could Disable 99% of Satellites in a Matter of Days

Rocket Lab — Our spacecraft just made interplanetary history - twice. Blue & Gold flawlessly executed powered Earth gravity assists, two days apart, to slingshot our planet and shoot for Mars’ orbit. This is the first time the highly complex maneuver has been executed successfully by spacecraft.

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Scientists Discover a 98-Million-Year-Old Mantis With 'Leaves' on Its Abdomen, Trapped in Amber »