Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Most dust particles in your house come from dead skin.
48
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
Sound at the right vibration can bore holes through a solid object.
134