There are two golf balls sitting on the moon.
721
The population of the Earth has more than doubled since 1950.
151
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124