More than 30 Federal agencies formed a working group in 1997 to make hundreds of Federally supported teaching and learning resources easier to find. The result of that work is the FREE web site. For an overview of what's available here at FREE, please vis

A large, aquatic relative of the elephant that grazes underwater vegetation around the coasts of Florida, the Caribbean and South America. Manatees a have large, rounded bodies ending in a paddle-shaped tail fluke and their front limbs are modified into f

The name sifaka comes from the noisy barking call they make during territorial confrontations. Verreaux's sifakas have a white body, with a brown crown. Some subspecies also have grey, black or rust-red areas on the thighs and forearms.

Snakes are important members of the natural world and make a significant contribution to the control of pests such as rats, insects, and other snakes. Poisonous snakes, however, are not desirable members of the human habitat. The risk of a poisonous snake

Take a look around the room that you are in. Notice how the various images and colors that you see update constantly as you turn your head and re-direct your attention. Although the images appear to be seamless, each blending imperceptibly into the next,