Out of all the senses, smell is most closely linked to memory.
146
Pure water (H2O) does not conduct electricity on its own.
46
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Indoor pollution is 10 times more toxic than outdoor pollution.
62
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Each day, up to 150 species of life become extinct.
-23
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16