A cubic yard of air weighs about 2 pounds at sea level.
31
In zero gravity, a candle's flame is round and blue.
16
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Sound travels about 4 times faster in water than in air.
408
Cold water weighs more than hot water.
93
Billions of neutrinos pass unnoticed through your body every second.
6
Out of all the senses, smell is most closely linked to memory.
146