0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
The smell of freshly cut grass is actually a plant distress call.
31
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118