A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Today's top fuel dragsters take off with more force than the space shuttle.
120
