A comet's tail always points away from the sun.
2
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Astronauts cannot burp in space.
232
Earth is the only planet in our solar system that's not named after a god or goddess.
17
A 100-pound person on Earth would weigh 38 pounds on Mars.
102