Balsa wood is classified as a hard wood!
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Pure water (H2O) does not conduct electricity on its own.
46
In zero gravity, a candle's flame is round and blue.
16
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
German chemists made a replica of a trophy the size of one molecule.
68
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18