When you ride the subway, approximately 15% of the air you breathe is human skin.

During the first 10 years of usage, the weight of a mattress doubles. This is because of the accumulation of dust mites and dust mite droppings.

Pick your brand of toilet paper carefully. Fecal matter is able to travel through 10 layers of paper.

In the United States, every year 2,500 left-handed people die from using equipment that was designed for right-handed people.

The FDA estimated that the average American eats a pound of insects every year. These insects are usually mixed in with other foods.

Young koalas have been known to eat their mother's poop.

When a new male lion takes over a pride, he kills all of the existing cubs.

In the United States, there are 5 times as many empty houses than there are homeless people.

The toilet seat is statistically the cleanest place in your home. Your desk, kitchen sink, grocery card, and cellphone all have more bacteria.

You're more likely to die on the way to buy lottery tickets than you are to actually win.

Smelling is caused by molecules from other objects sticking to the inside of your nose.

Restaurant ice machines are almost never cleaned. Trust me, they're really gross on the inside.

A single kiss can transmit 40,000 parasites and up to 250 types of bacteria.

According to the London School of Hygiene and Tropical Medicine, 16% of cell phones have poop on them.

In World War II, George H W Bush's plane was shot down over Japan. He was one of 9 men on board. The other 8 men were captured and eaten.

Thanks to FDA regulations, up 10 insects and 35 fruit fly eggs are allowed per 8 ounces of raisins

The FDA also allowed 150 bug fragments and 5 rodent hairs per pound of peanut butter.

Cruel Nazi human experiments are the reason we know so much about the stages of hypothermia.

On Mount Everest there are 200 corpses of failed climbers. They are used as guide points for climbers on their way up.

Some species of butterfly have been known to seek out and drink human blood.

Because they aren't as tasty as baby hens, baby roosters are usually tossed into a grinder after they're born.

Feet can sweat up to 20 liters every day.

Eskimo mothers use their mouths to suck the snot out of their babies' noses.

In ancient Rome, the crushed brains of mice were used as toothpaste.

According to a University of Arizona study, at least 20% of office coffee mugs contain fecal matter.