0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Sound travels about 4 times faster in water than in air.
408
Billions of neutrinos pass unnoticed through your body every second.
6
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Aluminum used to be more valuable than gold!
84
Indoor pollution is 10 times more toxic than outdoor pollution.
62