Most dust particles in your house come from dead skin.
48
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Scientists aren't sure what color dinosaurs were.
312
One barrel of petroleum holds 42 gallons.
20