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spookyghosties t1_jdmu8sr wrote

Reply to comment by _Dnikeb in TIL, the placenta that forms with a fetus isn't created by the mother. It grows from the fertilized egg and some fetuses actually develop outside the uterus attached to the intestines in the body cavity. by darw1nf1sh

It blew my mind when I discovered the mitochondria was once a different organism we just absorbed forever

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ThaLegendaryCat t1_jdmwf9d wrote

probably one of the most evolutionarily sucessful organisms on the planet. Or atleast high on the list considering that its practically universal in large parts of the tree of life .

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