In zero gravity, a candle's flame is round and blue.
16
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
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
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108