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300 Feet Long, Fueled by Liquid Hydrogen: The Secret Jet That Failed Before the Blackbird

Lockheed’s engineers bet on a hydrogen-powered aircraft, the CL-400 Suntan. Stretching nearly 300 feet and fueled by ...

Here's what happens to your body when clocks 'fall back' an hour

It's time for most of America to move clocks back on Sunday. Daylight saving time ends in the U.S. at 2 a.m. local time, ...