It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Forest fires move faster uphill than downhill.
52
The Atlantic Ocean is saltier than the Pacific Ocean.
54
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
More than 25% of the world's forests are in Siberia.
51
In 1850, only 8% of the people in California were women.
0