The only letter not appearing on the Periodic Table is the letter "J".
180
Iron weighs more after it rusts.
68
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The earth is approx. 6,588,000,000,000,000,000 tons.
175
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
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
Iron weighs more after it rusts.
16