If NASA sent birds into space they would soon die; they need gravity to swallow.
146
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
Sound doesn't travel in space.
255
Earth is the only planet in our solar system that's not named after a god or goddess.
17
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10