Balsa wood is classified as a hard wood!
41
Diamonds can be shattered with a hammer.
-104
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
According to studies, men change their minds two to three times more often than women.
72
A cesium atom in an atomic clock beats over nine billion times a second.
43
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Sound travels fifteen times faster through steel than through air.
134