A single speck of dust is half way in size between a subatomic particle and the Earth.
15
A cesium atom in an atomic clock beats over nine billion times a second.
43
Aluminum used to be more valuable than gold!
84
Iron weighs more after it rusts.
68
Scientists are now able to grow 'beating' heart tissue in a lab!
162
In zero gravity, a candle's flame is round and blue.
16
Sound travels fifteen times faster through steel than through air.
134