Solar viewer for the upcoming eclipse
21
votes
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NASA's 3D-printed detonation engine revs up for four minutes in breakthrough test
33 votes -
On the Moon, astronaut pee will be a hot commodity. Urine can be used for landing pads, gardens, and drinking water. But will there be enough to go around?
7 votes -
The world’s largest 3D metal printer is churning out rockets
7 votes