Iron weighs more after it rusts.
68
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Your brain is 80% water.
525
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
In zero gravity, a candle's flame is round and blue.
16
Pumice is the only rock that floats on water.
14