60 Stupidly Simple Facts That Will Blow Your Mind

40. Aluminum used to be such a precious metal, and so expensive, that the top point of the Washington Monument is made of pure aluminum. At the time of construction, that aluminum would be about like capping it with platinum today.

41. A day on Venus takes longer to complete Than a year on Venus. How? It simply takes longer for Venus to do one complete rotation around its own axis than it does for the planet to rotate around the sun.

42. A platypus lays eggs, and has milk, making it the only mammal that could in theory make its own custard.