Sound doesn't travel in space.
255
The light hitting the earth right now is 30 thousand years old.
163
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Astronauts get taller when they are in space.
224