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Why that "PLATYPUS" is the only mammal who lay's egg's?

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Newer studies seem to suggest that Monotremes, including the Platypus and 4 species of the Spiny Anteater, survived competition from newer arrivals to Australia such as the Marsupials, by evolving to live in water, and giving birth by laying eggs. Over time the Anteater returned to living on land but retained this egg laying characteristic common to Monotremes. More on the Platypus:http://www.livescience.com/27572-platypus.html.
Pretty cool animal!:-).

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Wow! You really know everything.
Princess Smart Pants.
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She sure does. I didn't know it.
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I know how to Google! LoL!!!
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Part of the evolution thing. Some of us are more evolved than others.

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God wanted it that way

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Yes sir. The platypus also evolved spurs on its hind legs for defense.
Its spurs have a cocktail of venom inside thats very very painful but not deadly. Cool huh?

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because the platypus doesn't care what people think and won't conform to our ideal mammal description

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The platypus is a monotreme, which is a mammal that lays eggs. There are a total of 5 monotreme species, all indigenous to Australia and New Zealand. So no, there are 4 other species that have this unique characteristic.

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Evolutionary hold over or link. Mammals evolved from reptiles, who lay eggs. This mammal still lays eggs as its in between true mammal and reptiles in the evolutionary web.

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It's nature man

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