The strangers in your dreams are actually people that you've seen in real life.
50
The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
118
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Your thumb is about the same size as your nose.
124
Mars had an oxygen-rich atmosphere around 4 billion years ago
13