Mercury 101 | National Geographic SUBSCRIBE: https://youtu.be/4JLjF89hz34 : https://youtube.com/ashbgame : The planet Mercury is named after the messenger of the Roman gods because of its fleeting nature across the sky. Find out the reason behind its incredible speed, if it is indeed the hottest planet in the Solar System, and why the smallest planet in the solar system is slowly shrinking.
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Mercury 101 | National Geographic