Sound travels about 4 times faster in water than in air.
408
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Most dust particles in your house are made from dead skin!
67
Balsa wood is classified as a hard wood!
41
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
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
Iron weighs more after it rusts.
68