From the top of Shifting Sands dune in the Serengeti Plain of Africa a million mammals are in motion ... Both sweat glands and mammary glands produce water, salts, and proteins, all of which ...

Mammals are among the most adaptable animals on the planet. They are found on every continent and in every ocean, and range in size from tiny bumblebee bats to enormous blue whales. One reason for ...

The sloth is the world's slowest mammal, so sedentary that algae grows ... and fruit from the trees and get almost all of their water from juicy plants. Sloths mate and give birth while hanging ...

The Hoffman's two-toed sloth is one of the world's slowest mammals—so sedentary that algae ... and fruit from the trees and get almost all of their water from juicy plants.

This story appears in the August 2010 issue of National Geographic magazine ... their jaw joints to hear in the air instead of water. Mammals turned out to be among the most successful of these ...

These docile marine mammals are categorized into three distinct species based on location, National Geographic reports. The North American east coast, including Florida, is home to West Indian ...