In zero gravity, a candle's flame is round and blue.
16
Sound travels fifteen times faster through steel than through air.
134
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
One cubic foot of gold weighs more than 1,200 pounds!
78
The smell of freshly cut grass is actually a plant distress call.
31
Balsa wood is classified as a hard wood!
41
The sun is 330,330 times larger than the earth.
75
Iron weighs more after it rusts.
68