There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
It takes eight and a half minutes for light to get from the sun to earth.
159
Astronauts cannot burp in space.
232
If two pieces of metal touch in space, they become permanently stuck together.
807
Astronauts get taller when they are in space.
224
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175