During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
The sun is 330,330 times larger than the earth.
75
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Balsa wood is classified as a hard wood!
41
Pure water (H2O) does not conduct electricity on its own.
46
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117