The word "deadline" comes from 19th-century American Civil War prison camps, where a line marked the boundary prisoners couldn’t cross without being shot. It later came to mean a strict time limit.

The five rings on the Olympic flag represent the five inhabited continents, with the Americas as one. Their colours are the most common found on flags around the world.

Your zodiac sign is likely wrong. They were created over 3,000 years ago; the Earth's tilt has since shifted, altering the constellations' positions in the sky.

The youngest world leader in history was King Alfonso XIII of Spain, who assumed the position in 1886 at 0 days old.

The Isle of Man TT is the world's deadliest race. This motorcycle race has been held annually since 1908, and only twice has no one died.

Wind turbines kill up to 100,000 birds annually in the UK. Interestingly, painting one of the blades black can reduce bird deaths by 70%.