How much time one could survive in space without a suit? Are there truly 24 hours in a day? Why could dinosaurs not live in the present day (shock: Jurassic Park is complete fiction)? Where are most of the volcanos on earth? Is there a river beneath the Amazon? How long has it been since it has rained on the driest place on earth? And what percent of the world’s species we have discovered (hint: not many)?

Here are 50 things you should know about the planet we live on.

50 awesome facts about earth