The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
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
Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
4
A cow produces around 200,000 glasses of milk in her lifetime.
373
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31