Betelgeuse, a red supergiant star located in the constellation Orion, has emerged as one of the night sky's most watched ...
Scientists have long opposed polar geoengineering. Some now believe it will be necessary.
Morning Overview on MSN
Why did NASA kill Apollo, then chase a wild mission to Mars?
The United States walked away from the Moon just as it seemed to master it, then spent decades sketching ever more ambitious paths to Mars that never quite left the drawing board. The shift was not a ...
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