There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
It would take more than 150 years to drive a car to the sun.
569