Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Your thumb is about the same size as your nose.
124
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
The largest breed of rabbit is the Flemish Giant.
65
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14