There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
As of 2011, gamers have collectively spent over 6 million years playing World of Warcraft. That's almost as long as the existence of the human species!
7
The oldest living person smoked cigarettes from the age of 21 to 117.
13