Facts, facts and more facts

Well, I like to know as many facts as possible, shall we get a facts thread started?
Source that confirms the fact is highly appreciated.
I shall start:

Fact: The first man to go over the niagara falls in a barrel and survive later died by slipping on an orange peel.
Source: Bobby Leach - Wikipedia, the free encyclopedia

Fact: Having cancer lowers your chance of getting Alzheimer, having Alzheimer lowers your chances of having cancer
Source: People with Alzheimer's disease may have lower risk of cancer and vice versa | e! Science News

Fact: The fastest supercomputer in 1976 ran at 80MHz and cost $80 million. The cheapest phones today run at 250Mhz!
Source: Page 2 - The history of supercomputers - Slideshow | ExtremeTech

Fact:
New York to London is 5567 kms & London to New York is also 5567 kms
Monday to Friday is 5 days but Friday to Monday is only 3 days.

There's pepperoni on a pepperoni pizza.

Everlong said:

There's pepperoni on a pepperoni pizza.

Dinesh said:

Fact:
New York to London is 5567 kms & London to New York is also 5567 kms
Monday to Friday is 5 days but Friday to Monday is only 3 days.

This sounds impossible source please :s

If we were to take all the elephants on Earth and put them head to head all the way into space, they would all die.

When you see ducks flying in a V, and one side is longer then the other, you know why that is?

More ducks.

A Guy

Fact:

No matter how loud you yell at your TV, people on the screen can't hear you.

The water that falls from the sky during a storm is called rain.