Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The strangers in your dreams are actually people that you've seen in real life.
50
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
14
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18