We have known for some time that as we age, our bodies need physical activity more. If we get that activity, we live well longer.
We are learning that the mind also needs special care as we age. It seems to need more mental stimulation in order to maintain our cognitive capacity. That might mean taking on a new learning challenge. It might also mean getting re-connected with friends.
This is yet more evidence that our old way of thinking about aging is bass ackwards. Hmmm … I wonder if this at all explains what is wrong with the presdient.