The Golden Girls dug into more than 100 cheesecakes: Over the course of The Golden Girls's seven-year run, they ate around 100 cheesecakes, according to the baker who made them. "For the run of the show, I would create seven cheesecakes for the Friday-night taping. … I would box up seven cheesecakes by 4 p.m., all identical," he said. That was just in case they had to do multiple scene takes. Did you know this?

There's enough gold inside Earth to coat the planet: Earth really has a heart of gold: 99% of the precious metal can be found in the Earth's core, Discover Magazine reports. How much is there? Enough to coat the entire surface of the Earth in 1.5 feet of gold. Did you know this?

Fact: Your eye can see a million different colors: According to the American Academy of Ophthalmology, humans can distinguish approximately 10 million colors. That's thanks to the cone cells in your retina, the back part of your eye that senses light and sends signals to your brain. These alerts allow you to perceive different colors. Did you know this?

People can use only a small fraction of Earth's water: In school, we were taught that most (about 71%) of the planet's surface is covered in water. While that's true, just 0.007% of that water is usable for people, according to National Geographic. That's because only about 2.5% of Earth's water is fresh water, and only a little more than 1% of that is accessible—most of the rest is made up of glaciers, polar ice caps and snowfields. Did you know this?