The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Lightning strikes about 6,000 times per minute on this planet!
158
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
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