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Article: Marsupials.
- Article from:
- Science Weekly
- Article date:
- March 3, 2009
CopyrightCOPYRIGHT 2009 Science Weekly, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Background
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Marsupials are mammals whose babies are born in an embryonic state. The neophytes must leave their mothers' uteruses and pull themselves up to attach to their mothers' nipples. In a number of species there aren't enough nipples for the babies, so not all survive. The tiny creatures stay in their mothers' safe, warm marsupians (body pouches) and are nourished by her milk until they can live on their own. Special muscles around the opening of the pouches can be tightened to hold the babies inside. Even after they no longer fit inside their moms' pouches, young marsupials return to nurse. Not all pouches are the same. The ...
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Article: Tiny Skeleton May Be From the World's Oldest Marsupial
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... ... of the oldest marsupial yet found, a ... dispersion and fate of marsupials -- pouched mammals ... paleontologists think about marsupials. Until Sinodelphys, the oldest marsupial remains were 110 ... In fact, marsupials are so dominant ...
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