placenta – Uncommon Descent

The mammalian placenta features “universal assembly instructions”

So was there a single “ancestral mammal” or is it a common design (convergent evolution)? Either is quite plausible today.

Biology Culture Darwinism Intelligent Design

The wholly accidental world of the placenta…

… in which we encounter the remarkable phenomenon of microchimerism (“These cells find their way into mother’s tissue and start acting like the tissue in which they find themselves. This process is known as feto-maternal microchimerism”)

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