Mars had an oxygen-rich atmosphere around 4 billion years ago
13
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Lightning strikes about 6,000 times per minute on this planet!
158
The population of the Earth has more than doubled since 1950.
151
Jupiter is bigger than all the other planets combined.
254
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127