system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why the aging process varies between species (Humans, Dogs, Turtles etc.)
gpt
Because we and they age differently and have different strategies for reproduction.

One of the things most of us are programmed to do is to have kids that carry on the species. Depending on how many and how often, once that job is done our own purpose isn't as necessary so off we go into that good night eventually. Mice have lots of kids REALLY fast, dogs have larger litters, and humans take a long time to do it in onesies and twosies. So we have to live long enough - at least ten years after giving birth - to raise enough kids to carry on the species or our species would have died out. Because it grows up so quickly, a dog can put out a lot of puppies and finish its species-propagating job well before that.

The aging process is affected by a whole lot of stuff. Part of it is how good your DNA (your basic blueprint that's found in every cell and was the instruction guide that made you you once mom and dad got busy) is protected against damage. There's some interesting research going on for Bowhead Whales that live a VERY long time - 200 years! - as they have certain genes that are good at repairing DNA.

And part of it is how rough our environments are. Many humans live WAY longer than they normally would because they're in a nursing home, for example.