Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
If Earth's history was condensed into twenty-four hours, life would've appeared at around 4am, land plants at 10:24pm, dinosaur extinction at 11:41pm, and human history would’ve began at 11:58:43pm.
21
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
The strangers in your dreams are actually people that you've seen in real life.
50