Scientists found tryptophan, the ‘sleepy’ amino acid, in an asteroid — Here’s what it means

Tryptophan, the essential amino acid behind the Thanksgiving myth that eating turkey can make you sleepy, has been found to ...
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NASA probe captures stunning photos of Earth and moon on the way to infamous asteroid Apophis

NASA's OSIRIS-APEX spacecraft captured stunning new images as it whipped past Earth during a high-speed slingshot maneuver, ...