NASA Devised a Wild Plot to Capture an Asteroid and Save Humanity. It Almost Failed
The space agency defied incredible odds to get its asteroid-hunting OSIRIS-REx spacecraft off the ground. Since then, the ...
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'Mini Moon' Prepares to Leave Earth Until 2055
After a two-month visit, 2024 PT5 is ready to continue its cosmic journey—but it will be back in a few decades.