My guess is that anti-aging traits don’t get selected by evolution since reproduction has already happened in the younger years of the organism.

Natural selection doesn't work like that. Having two offspring is good. Having three offspring is even better. Having ten offspring is really great. More than than ten is greater still...

There's a common theory that for mice, they're unlikely to survive for many years because of predation, so there's not much benefit to preventing aging in later years. Small benefit means any counterbalancing disadvantages (lower vigour?) could outweigh the anti-aging benefit, or that the force of selection is insufficient to overcome random mutations that degrade the anti-aging mechanism, but "that's good enough, no need for more" is not how evolution works.

You can use it in Cursor!

Is it just me or half these comments read like AI