Random : 5 things you didn't know about Space

1. China's air pollution is visible from space.
2. There are 22,000 man-made objects orbiting Earth that are 10cm or longer.
3. The total cost of building the International Space Station was $150 billion.
4. A human being can survive 2 minutes in space without protection.
5. A tardigrade, the hardest animal can survive 10 days in vacuum.