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
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A ball of glass will bounce higher than a ball made of rubber.
73
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Balsa wood is classified as a hard wood!
41
Out of all the senses, smell is most closely linked to memory.
146
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6