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

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

The microwave was invented after a researcher walked by a radar tube and a chocolate bar melted in his pocket. See more

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

The light from your computer screen streams at you at almost 186,000 miles a second. See more

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

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

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

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

Leonardo Da Vinci invented the scissors. See more

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

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

10% of human dry weight comes from bacteria. See more