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
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Your brain is 80% water.
525
Nylon is made from coal and petroleum.
42
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
4.5 pounds of sunlight strike the Earth each day.
27