Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
291 | Venki Ramakrishnan on the Biology of Death and Aging
Venki Ramakrishnan
And if they can't make it and they are in any way defective, they just don't have a chance to undergo fertilization. And even after the embryo is formed, many embryos spontaneously abort without the mother even being aware of it in many cases. Some cases they are aware if it's later and there's a miscarriage. And so there's ruthless selection there.
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