We asked the BuzzFeed Community to tell us the craziest facts they know. Here are the wild results.
1. As recently as the 1980s, many researchers and doctors believed that babies couldn't feel pain, so some were operated on without any anesthesia.
2. All cruise ships have a functioning morgue on board.
instagram.com, Fox
—Koeyoshi Yokohama, Facebook
3. There are colors that humans can't see, and you can't even try to imagine what they look like.

Flickr / Creative Commons / Flickr: blieusong
5. The average person walks by almost 16 murderers in their lifetime.

Santa Cruz County Sheriff's Office / Wikipedia / Creative Commons / en.wikipedia.org
Here's the math, assuming you lived in an average-sized city:
10 new people per day x 365 days per year x 71 years of living = about 260,000 different people you might walk by. 260,000 people in a lifetime x 6 murderers per 100,000 people = 15.6 murderers.
—Tina Babina, Facebook
6. There are things called eyelash mites that live on people's faces, and you probably have them.
Wikipedia / Creative Commons / en.wikipedia.org, youtube.com
—Lea Roselli, Facebook
8. Even if your lungs filled up with the same amount of liquid, it could take an extra 10 minutes for you to drown in saltwater than it would in freshwater.

Universal Pictures
—Esmerelda Szak, Facebook
9. Serial killer Joe Metheny owned a food stand and sold burgers that combined animal meat with the flesh of his victims to unsuspecting customers.

Public Domain / instagram.com
10. There are more ways to shuffle a standard deck of cards than there are atoms on Earth.

thebigblogtheory.wordpress.com
Mathematicians refer to the possibilities of shuffling a deck as "52 factorial" (so, 52 x 51 x 50 x 49, etc.), or 80,658,175,170,943,878,571,660,636,856,403,766,975,289,505,440,883,277,824,000,000,000,000 chances.
11. As a result, every time you shuffle a deck of cards, you're probably the first person in history to shuffle them in that sequence.

Buena Vista Pictures
13. Ted Bundy was a serial killer who also worked at a suicide hotline. A coworker once said, "Ted Bundy took lives, but also saved lives."

Salt Lake County Sheriff's Department
14. The Japanese giant hornet has venom that's so powerful, it can dissolve human tissue.

National Geographic / youtube.com
15. Violet Jessop, aka Miss Unsinkable, survived the sinking of the Titanic, a collision on the RMS Olympic, and the sinking of the Britannic.
Wikipedia / Creative Commons / en.wikipedia.org, Paramount Pictures
17. Arsenic was used to dye clothes green in the 19th century, but Victorian Britain didn't know it was poisonous, so several people died.
BBC Films, Warner Bros.
18. In the Victorian Era, it was common to take pictures with the bodies of a deceased family member, as a final way to preserve their memory.

Wikipedia Commons / Public Domain
19. In 1978 in the midst of his murder spree, serial killer Rodney Alcala won an episode of The Dating Game. The woman who picked him refused to go on the date because he seemed "creepy."

20. The first person to die while building the Hoover Dam was John Gregory Tierney, and the last was Patrick William Tierney, his son, exactly 14 years later.
Flickr / Creative Commons / Flickr: cbarron, Flickr / Creative Commons / Flickr: jkid2009
21. Astronaut Michael Collins took a picture of Neil Armstrong and Buzz Aldrin in the Lunar Module, with Earth in the background, meaning he took a picture of every human who ever lived, except for himself.

Wikipedia Commons / en.wikipedia.org / Michael Collins / NASA
22. Babies are born with about 300 bones, but as they get older those bones fuse together to form 206 bones.

NBC / Fox Searchlight Pictures
—Diana Haven, Facebook
24. Turritopsis dohrnii, aka the immortal jellyfish, is a species that ages in reverse and then restarts its life cycle over...forever.

Wikipedia / Creative Commons / en.wikipedia.org / Bachware
25. And people jerk themselves awake while sleeping because their body thinks they're dead – it's their brain's way of making sure they're still alive, since their heart rate is so slow.

Nickelodeon