Ageing is, simply and clearly, the accumulation of damage in the body. That's all that ageing is.

Basically, the body does have a vast amount of inbuilt anti-ageing machinery; it's just not 100% comprehensive, so it allows a small number of different types of molecular and cellular damage to happen and accumulate.

I don't often meet people who want to suffer cardiovascular disease or whatever, and we get those things as a result of the lifelong accumulation of various types of molecular and cellular damage.

The whole point of cryopreserving only one's head is based on the idea that one can simply grow in the laboratory an entire new body, without a head, and stick it onto the cryopreserved head.

In the eye, there is a type of junk that accumulates in the back of the retina that eventually causes us to go blind. It's called age-related macular degeneration.

As far as I'm concerned, ageing is humanity's worst problem, by some serious distance.