In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Lightning strikes about 6,000 times per minute on this planet!
158
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
It takes eight and a half minutes for light to get from the sun to earth.
159