Top 100 Facts
The International Space Station travels 253 miles (408km) above the earth at 17,100 (27,519km/h) miles per hour and completes a full circle of the earth every 90 minutes. Astronauts on board get to see a sunrise and sunset 16 times each day.
More than 1.5 million seeds of various plants from around the world are stored at the Svalbard global seed vault in Norway. To ensure the safety of the seeds, it was built inside a tunnel carved under a mountain.