The heart of an astronaut actually gets smaller when in outer space.
216
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
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The Earth gets 100 tons heavier every day due to falling space dust.
673