A cubic yard of air weighs about 2 pounds at sea level.
31
Your brain is 80% water.
525
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
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
The smell of freshly cut grass is actually a plant distress call.
31
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Iron weighs more after it rusts.
68