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

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

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

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

Your system of blood vessels is over 60,000 miles long. That's long enough to go around the world more than twice! See more

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

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

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