By Neil deGrasse Tyson
Published December 28, 2018 2:30pm
Neil deGrasse Tyson and Chuck Nice answer your Cosmic Queries about colonizing Mars. Now extended with more questions on militarizing space, the wild frontier of space law, planetary orbits, gravity, Pluto, the heliosphere, the Drake equation, Panspermia, and more.
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Photo Credit: NASA/JPL-Caltech
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