Angel Falls in Venezuela is the worlds highest waterfall, The water of Falls drops 3,212 feet (979 meters).
The temperature of Earth increases about 36 degrees Fahrenheit (20 degrees Celsius) for every kilometer (about 0.62 miles) you go down.
March 14 is "Save a spider day."
Blueberries are the second most popular berry in the United States.
The origin of the word "volcano" is derives from Vulcan, the Roman god of fire.
In 1783 an Icelandic eruption threw up enough dust to temporarily block out the sun over Europe.
Earth's largest continuous mountain chain is the Mid-Ocean Ridge, stretching for 40,000 miles, rising above the surface of the water in a few places, such as Iceland. It is four times longer than the Andes, Rocky Mountains, and Himalayas combined.
Rainforests are threatened by unsustainable agricultural, ranching, mining and logging practices.
Tarantulas are poisonous, but the concentration of the venom in those found in North America is low enough that they're usually not a threat to human life. In fact, some people keep them as pets.
Trees are the longest living organisms on earth.