Body Hair

We have just as much hair all over our bodies as chimpanzees or monkeys or any other furry primate. Most of it is just very short and light. It's called "vellus hair" or "peach fuzz". I think it's bizarre that most of our thick hair is on the tops of our heads. Imagine if dogs looked like that! On second thought, maybe it's better if you don't imagine that.
Research shows that we humans lost all our body hair through evolution about a million years before somebody finally figured out how to purchase clothes at one of the first primitive Walmarts.
One theory says that we lost our all body hair in an attempt to avoid parasites like ticks, fleas, and lice, and that we've only kept the hair on our heads because other people think it's pretty. As proof, consider that you haven't seen many bald pregnant women.
There is a very special kind of louse that only lives in human clothing. DNA tests indicate that it evolved from a louse that only lives in human hair, and that this happened about 42,000 to 72,000 years ago. So, that's probably roughly when clothes first went on sale. There are no special lice that live in any form of footwear, so DNA testing cannot solve the troubling mystery of exactly at what point in the past Hello Kitty themed socks were invented.

Water

Scientists believe that when the Earth initially formed, it was hot and dry, and there was no indoor plumbing. So where did all the water come from?
The current leading theory is that billions of years ago, water was brought to Earth along with impacts by comets or icy asteroids. (Comets are made of rocks and ice.) Archeological evidence suggests that flushable toilets were invented much later, around 1500 B.C., on the island of Crete.
This is pretty amazing, considering that there are 1.37 billion cubic kilometers of water in the oceans. Luckily, we did not have to pay for any of it. At current utility rates, and adjusting for inflation, the water would have cost roughly one third of a million trillion dollars.
Keep this in mind that the next time you're drinking a tall, refreshing glass of "comet juice

Space Shuttle

OK here is the deal with space shuttle. It has three rocket engines in the back, but there's absolutely no room inside for all the fuel it needs to launch itself up into space. All of the fuel is stored outside the shuttle, in the big brown cylinder, called the external tank. The tank conetaining all the rocket fuel weighs seven times more than the space shuttle itself! That's a lot of really heavy fuel, and the space shuttle engines aren't quite strong enough to push the combined weight of the shuttle and the big bloated external tank up off the ground. That's what the two long white solid rocket boosters strapped onto the sides of the external tank are for. They lift the talk! Fortunately, it was not necessary to strap an infinite series of smaller and smaller rockets to the sides of the solid rocket boosters. It is not widely know that just behind the main flight deck of the space shuttle is a small Starbucks adapted for use in zero gravity.