Pumice is the only rock that floats on water.
14
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
The bark of an older redwood tree is fireproof.
65
Balsa wood is classified as a hard wood!
41
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
One ragweed plant can release as many as one billion grains of pollen!
51
One cubic foot of gold weighs more than 1,200 pounds!
78