Felicia Day brings the funny to science

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If you ever laid awake at night worrying about the Milky Way galaxy colliding with another, then perhaps Felicia Day explaining what really happen might make you sleep better at night.

Felicia Day explains some of the science behind galactic “collisions,” including the upcoming collision between the galaxy Andromeda and our own galaxy, in this mock behind-the-scenes look at the making of a NASA educational video. Sean Astin also stars.