The smell of freshly cut grass is actually a plant distress call.
31
Diamonds can be shattered with a hammer.
-104
One cubic foot of gold weighs more than 1,200 pounds!
78
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
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
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Scientists aren't sure what color dinosaurs were.
312