The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
14
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
The strangers in your dreams are actually people that you've seen in real life.
50
Mars had an oxygen-rich atmosphere around 4 billion years ago
13