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Lt. Commander
Join Date: Dec 2007
Posts: 120
# 44
02-20-2012, 04:51 AM
Originally Posted by troodon311 View Post
They're not mammals, no. Mammalia is a monophyletic clade encompassing the most-recent common ancestor of Ornithorhynchus anatinus (the platypus) and Homo sapiens (humans) and all of the descendants of that ancestor. This isn't about knowing Star Trek, it's about knowing evolutionary biology.
any vertebrate of the class Mammalia, having the body more or less covered with hair, nourishing the young with milk from the mammary glands, and, with the exception of the egg-laying monotremes, giving birth to live young.... yup mammals