In zero gravity, a candle's flame is round and blue.
16
Diamonds can be shattered with a hammer.
-104
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The bark of an older redwood tree is fireproof.
65
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
Iron weighs more after it rusts.
16
Nearly 50% of the world's scientists are assigned to military projects.
71