The smell of freshly cut grass is actually a plant distress call.
31
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
One ragweed plant can release as many as one billion grains of pollen!
51
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Aluminum used to be more valuable than gold!
84
Research indicates that plants grow healthier when they are stroked.
173