In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Only about 2% of the world population has green eyes.
36
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Lurch, a Watusi bull, had the largest horns in the world.
32
Your body is creating and killing about 2.4 million red blood cells per second.
17