37K views · 405 reactions | A giant meteor, freezing over, or over-heating.... However this planet goes, we're going to need a Plan B if we want to survive. Watch 'How the Universe Works' Tuesdays at 10pm ET on Science Channel or anytime on SCI GO: https://bit.ly/2VugeCC | Science Channel | Facebook

Our galaxy will one day collide with the Andromeda galaxy. Not worried or anything... | Science Channel

From clouds of cosmic gasses to a "Blue Planet" rich with life, here's how we think Earth was formed. http://bit.ly/2pr5g3c | Science Channel