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
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
No matter how cold it gets, gasoline will not freeze.
107
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
The force of a suction cup is calculated using F=AP.
15