Think you know everything about everything? Check out these 12 surprising facts to find out if you’re right!

#11. Lightning “tattoos” its victims

If you survive a lightning strike, there’s a good chance you’ll wear a mysterious pattern called a “Lichtenberg figure” for the rest of your life…but no one knows why.

#10. Dolphins eat puffer fish to get high

A documentary film captures young dolphins sharing a puffer fish, which releases a nerve toxin that produces a narcotics effect in small amounts.

#9. Fetal stem cells can heal a mother’s heart

Over half the women who develop heart weakness during or just after pregnancy recover spontaneously – a fetus basically ensures its own survival by protecting the mother’s heart.

#8. Someone has been in space for 437 days and 18 hours – consecutively

His name is Valeri Polyakov.

#7. NASA’s internet speed is 91gb/second

You could download your favorite television series – all of it – in less than a second. That is, if you could access their private network.

#6. Steve Jobs made the iPad lighter by tossing it in water

He wanted a lighter product but was told by engineers it was impossible. He tossed the prototype in a fish tank and when bubbles floated out of it as it hit the bottom, he said “those are air bubbles. That means there’s space in there. Make it smaller.”

#5. A fitness coach gained – and lost – 66 lbs in a single year

His name is Drew Manning and conducted the experiment in an attempt to understand why people want to lose weight.

#4. JK Rowling donated over $160 million to charity in 2012

She normally appears on lists of the world’s richest people, but that year she didn’t because of her charitable contributions.

#3. Eagle vision is even better than you think

You’d be able to see an ant from a 10-story building, to detect more colors and even UV radiation, and have a 340 degree visual field.

#2. Germany counts its trees

All the trees in parks are numbered in order to collect data. They love their order!

#1. The Japanese use unique seals in lieu of signatures

You’ll need a hanko, or personal seal, to sign any official documents.

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