Mammals live all across the world. They can be found living in the ground, in trees, and even in the sea. There are many different kinds of mammal, including us humans! Find out more about ...

Of the 4,060 species of mammals that inhabit the world, fifty-three occur within the Adirondack Park. These mammals represent 7 orders and 17 families. Some species, like the opossum and striped skunk ...

In her second paper on this subject (1962), Lyon extended her analysis to other species, including cats and humans, concluding that X inactivation applies generally to mammals.