| | Sea Otters Help Protect Seagrass Meadows Seagrass meadows around the world are declining and a group of scientists from the University of California, Santa Cruz are now studying them to find out more about these unique... Read more | Invertebrates Invertebrates are animals that do not have a backbone or a bony skeleton. There are more than thirty groups of invertebrates. Some of the more commonly known groups include... Read more | Barn Swallows Benefit From Darker Breast Feathers The darker the breast feathers of a female barn swallow, the healthier she is a new study has revealed. According to scientists from the University of Colorado, Boulder, and Cornell... Read more | Mammals Mammals are a group of vertebrates that includes about 21 groups such as anteaters, bats, carnivores, cetaceans, elephants, marsupials, primates, rodents and many others. There are about 5,400 species of mammals alive today. Mammals first appeared about 200 million years ago during the Jurassic Period. The articles listed below provide information about the characteristics, classification and evolution of mammals. | | | | Related Searches | | | | Featured Articles | | | | | | Sign up for more free newsletters on your favorite topics | | | | You are receiving this newsletter because you subscribed to the About.com Animals newsletter. If you wish to change your email address or unsubscribe, please click here. About.com respects your privacy: Our Privacy Policy Contact Information: 1500 Broadway, 6th Floor New York, NY, 10036 © 2013 About.com | | | | Must Reads | | | Follow me on: | | | | Advertisement | |
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