What is OSIRIS-REx? Everything you need to know about the 1st NASA spacecraft to land on an asteroid

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OSIRIS-REx is due to make its return to Earth on Sept. 24. Here's everything you need to know about the mission and what it may reveal about the beginning — and the potential end — of life on Earth.

What is OSIRIS-REx? Everything you need to know about the 1st NASA spacecraft to land on an asteroid : Read more