The Greeks called them “river horses." Eyes and nostrils on top of the head help this behemoth — the third largest land mammal — see and hear while in water up to 16 hours a day. At night, hippos graze, consuming about 80 pounds of grass.
Hippos once populated lakes and rivers throughout sub-Saharan Africa. Today, they are mostly found in eastern and southern Africa.
A kind of plumbing system distributed throughout the body, the lymphatic system works together with the circulatory and immune systems.
The lymphatic system removes viruses, bacteria, cancer cells, and extra-cellular fluid from the blood stream, all in an attempt to keep you healthy.
The wind is clean, it's renewable, and enough of it blows across our planet to meet everyone's energy needs many times over. In fact, just one giant wind turbine can turn enough wind energy into electrical energy to power hundreds of homes.
Unless the wind isn't blowing, of course. Then those turbines do nothing. So can we rely on wind, clean and renewable as it may be?
Much of what you’ve heard about is probably urban myth (toilet flushes and curve balls). The Coriolis effect is a force that deflects a moving body in a rotating environment from a straight path.
The Coriolis force deflects large-scale atmospheric systems to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Explore this phenomenon.
This community of plants, animals, and other organisms interact with physical features such as soil, water, and temperature. These organisms function as producers (plants), consumers (animals), and decomposers (plants and animals).
Ecosystems can be any size, from tiny tide pools to vast tallgrass prairies. Organisms, humans included, will often regularly move in and out of different ecosystems.