Why are Platypuses conspired mamals if they lay eggs?
In: Biology
The important things to make a mammal a mammal are actually not related to giving live birth.
The important bits are hair, the structure of the ear and brain, and making milk.
There is another category within what we call mammals, called therians, and thats where the live birth thing comes in. The vast majority of modern mammals are therian so thats where the confusion comes in.
Its like if you had only ever seen red balls in your life, and then someone shows you a yellow ball. “But all balls are red” you say, but its really just that *most* balls are red, and that the redness and ballness arent necessarily related.
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