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MHS Library | Life Science



Bears are part of the Mammalia Class and are within the order Carnivora. There are only 8 living species of bear and each has stocky legs a long snout, thick shaggy hair and five non-retractile claws.

Big Cats

Big cats like lions, tigers, leopards, jaguars and cheetahs all have the distinguishing characteristic of being able to roar. Read our articles and watch videos and slideshow galleries of big cats.


Marsupials are mammals that commonly bear a pouch such as Kangaroos and Koala Bears. Two thirds of marsupial species are found in Australia.


Insectivores are carnivorous mammals that survive by eating almost nothing but small insects. Insectivores include bats, frogs, lizards and anteaters.


Nearly 40% of mammal species are rodents, and they are found on every continent except Antarctica. Rodents include mice, rats, squirrels, chipmunks and beavers, among others.