One ragweed plant can release as many as one billion grains of pollen!
51
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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
Research indicates that plants grow healthier when they are stroked.
173
The sun is 330,330 times larger than the earth.
75