Ever since I read about the 10th President of the United States John Tyler's grandson Harrison Tyler still being alive today, I've been wanting to read more mind-blowing facts.

So, without posting a link to some "Top 10 Mind Shattering" BuzzFeed link, can you list known facts that are mind boggling?

Inb4 pointless mom jokes, God-lovers sharing religious "facts," and lunatics posting opinions.
Please only post verifiable, provable, 100% legit FACTS.

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I'll start it off:

There are more stars in the universe than grains of sand on all of Earth's beaches combined.
There are more atoms in a grain of sand than the number of stars in the universe.
Mathematical Proof