Trees renew our air supply by absorbing carbon dioxide and producing oxygen.
Roots are covered with root hairs that absorb water and minerals.
Dendrochronology is the science of calculating a tree's age by its rings.
You're more likely to get stung by a bee on a windy day that in any other weather.
Lightning sets about 10,000 forest fires every year in the United States.
Fleas can accelerate 50 times faster than the space shuttle.
Between evaporation and falling as precipitation, a droplet of water may travel thousands of miles.
Elephants have no natural predators. However, lions will sometimes prey on young or weak elephants in the wild. The main risk to elephants is from humans through poaching and changes to their habitat.
Bananas are the most popular fruit in America. The average person eats 33 pounds of bananas a year!
Before 1500 A.D., there were approximately 6 million indigenous people living in the Brazilian Amazon. But as the forests disappeared, so too did the people. In the early 1900s, there were less than 250,000 indigenous people living in the Amazon.