What the Mars InSight Lander Discovered Over its Lifetime

The tweet that came from Mars Monday morning actually didn’t originate from anywhere near there. It came from NASA’s Jet Propulsion Laboratory in Pasadena, Calif., where the mission of the Mars InSight lander is managed. Still, the message was a poignant one.

“My power’s really low,” read the tweet, which was accompanied by a picture taken by the spacecraft, …

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