The earth is approx. 6,588,000,000,000,000,000 tons.
175
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
The bark of an older redwood tree is fireproof.
65
One barrel of petroleum holds 42 gallons.
20
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Indoor pollution is 10 times more toxic than outdoor pollution.
62