There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115