Why do trees live longer than humans, have you ever wondered?

No ....I've never wondered about that.....so best answer I have off top of my head is , Cos. I'm helpful then :)

They're structured differently than us. They are more durable than us, as in they don't have to go about searching for food, getting stabbed won't kill them, etc, they don't have heart attacks, they don't have as complex systems therefore they don't have the same diseases or requirements to keep things up. They're different organisms entirely.

There is a loose correlation between longevity and size. Giant tortoises, elephants, people, and trees tend to be longer lived than mice, insects, cats, and lemurs. As a generalization, larger living things take longer to mature. Ask any 17-year-old human's parents. Plants may not have to educate their offspring, but they certainly have to compete with other plants to get the sunlight and nutrients they need to prosper. Trees developed height by competing with each other for light, and achieving those sizes takes a long time. So trees are often long-lived. Fifty years is common for many trees. Some species approach 1000 years. A few produce clonal colonies (where a single plant produces many trees), and these colonies can reach 80,000 years in age.

I don't really know they just do.

I woodn't know.

Well according to Google, it has something to do with stem cells

They might have Nature on there side.

Well, I notice they don't bother to exercise.