The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The earth travels through space at 660,000 miles per hour.
189
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The earth rotates more slowly on its axis in March than in September.
145
The heart of an astronaut actually gets smaller when in outer space.
216