All the stuff you mention, you can measure. How do you measure intelligence? The kind of intelligence/wisdom that leads to making new scientific discoveries?

I will posit that raw intellectual horsepower might decline with age (and even then, what the hell is this thing and how would we measure it?), but it's also clear to me that decades of accumulated wisdom and study can increase the likelihood of making a new discovery.

Of course eventually you start running up against mechanical limits and you decline. But that peak is much later than the peak in sensory bandwidth.

Studies show that older people are smarter. Despite your apparent youth, I'm fairly certain you can find the relevant studies.

https://en.wikipedia.org/wiki/Fluid_and_crystallized_intelli... :

"In psychology, fluid and crystallized intelligence are factors of general intelligence, originally identified by Raymond Cattell."

Fluid intelligence peaks around 18 years of age, then declines.

Crystallized intelligence is your accumulation of knowledge and skill. It increases until age 65 then slowly declines.

Readers should be careful not to interpret this as meaning you're washed up at age 66. It means you're still close to your peak.

If peak physical condition was correlated with peak intelligence, we would expect 17-18 year olds to be making major changes in our world