1.
There are more microbes than the total number of all humans who have ever been born in just *one* linear centimeter of your lower colon.
2.
In about 7 billion years, our own Milky Way Galaxy and the Andromeda Galaxy will collide.
3.
There's evidence that there was once life on Mars.
4.
Europa has an ocean of liquid water even though everything in its location should be completely frozen.
5.
If you fall into a black hole, your body would become distorted until you're a stream of atoms.
*Goes into existential crisis*
And you can learn even more incredible facts in Neil's new book, StarTalk, based on his StarTalk TV show on the National Geographic Channel.