Most dust particles in a US house are made from dead skin. See more

A day on the planet Mercury is twice as long as its year. See more

The Netherlands has built 800 miles of massive dikes and sea walls to hold back the sea. See more

The 'save' icon on Microsoft Word shows a floppy disk, with the shutter on backwards. See more

The right lung is slightly larger than the left. See more

Those stars and colours you see when you rub your eyes are called phosphenes. See more

Intelligent people have more zinc and copper in their hair. See more

The human heart creates enough pressure when it pumps, to squirt out blood 30 feet high. See more

Banging your head against a wall uses 150 calories an hour. See more

A cat's urine glows under a black light. See more

A single individual, Dr. Lieven P. Van Neste, owns over 200,000 domain names! See more

Wearing headphones for just one hour will multiply the number of bacteria in your ear 700 times. See more

February 1865 is the only month in recorded history not to have a full moon. See more

You use over 70 muscles to say one word. See more

Your muscles make up about one-half of your body weight. See more

The thumbnail grows the slowest; the middle nail grows the fastest. See more