[adrianN]

They start to hurt around year fifty.

[tshaddox]

Hard to blame evolution for that given that reproduction is much rarer after age 50.

[adrianN]

It's a lot easier to take care of your grandchildren if you can move without pain, but I thought the whole point of this conversation was arguments as to why evolution is not as perfect as one might think.

[tshaddox]

For most of human evolution, wouldn’t 50 be incredibly old to become a grandparent?