Iron weighs more after it rusts.
68
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Billions of neutrinos pass unnoticed through your body every second.
6
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Nylon is made from coal and petroleum.
42
Scientists in Germany have developed a candy that doesn't cause cavities.
11