10 Mind-Boggling Facts That You Probably Don't Know

In the 1800s, aluminum was valued more than gold and silver because it was more rare. Unlike iron, aluminum is difficult to extract from ores. Once a chemist figured out how to get some flakes, people loved the color and shine of this new metal.

Both giraffes and humans have seven neck vertebrae. The difference, however, is that each giraffe bone can be over 10 inches long.

Instead of aging, crocodiles get physically bigger. A young crocodile is actually in the same shape as one 10 times its age. Because they keep growing in size over their lifetime, they require a lot more food. They'll die from either starvation or disease.

Camels are a huge part of the Muslim diet, and due to a camel shortage, Saudi Arabia has looked to other places to get their meat. The remaining population of wild camels is in Australia.

Australia's garnet sand is also largely exported to the country because of its unique properties ideal for sandblasting. This technique is used to pressure-clean building surfaces.

This 45-letter word is a lung disease caused by inhalation of silicate or quartz dust.

Even after being told that your treatment is a sugar pill, your symptoms can still drastically improve fully knowing it's fake.

The ocean covers more than 70 percent of the Earth, and 95 percent of it still remains unseen by us.

Subvocal speech is when your throat receives nerve signals that control speech. You might be thinking or reading to yourself without saying anything aloud, but your tongue and vocal cords are still getting signals from your brain.