For 50 years, models of the Moon's origin assumed it assembled slowly from a debris disk. Simulations that correct a key ...
How did Earth get its Moon? New simulations suggest a Mars-sized body called Theia collided with Earth 4.5 billion years ago, and the Moon could have formed within hours.
For anyone who has ever wondered whether they could handle life on another planet, NASA is offering a chance to find out -- well, sort of. The U.S. space agency is looking to recruit four participants ...
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