To get a PhD you have to write a thesis. To keep your job as a professor, you have to keep writing those things although once you get tenure it seems like you no longer have to defend them. Here's one that suggests that there's an inverse correlation between physical activity and intelligence. While it's true that there are a lot of jobs out there for which a strong back and a weak mind will qualify you, is it not also true that a sewing machine operator expends about the same energy as a desk jockey with a fancier desk.
" The researchers, led by Todd McElroy, then selected 30
'thinkers' and 30 'non-thinkers' from the pool of candidates.
Over the next seven days both groups wore a device on their
wrist which tracked their movements and activity levels,
providing a constant stream of data on how physically active
they were. Results showed the thinking group were far less
active during the week than the non-thinkers.
Proving that people with desk jobs are somehow smarter than people
with hammers or shovels. I think he's got it exactly backwards.
Civilizations greatest advances were invented by inherently lazy
people looking for some way to produce wealth without producing a
commensurate amount of sweat. Being lazy is not a sign of high
intelligence, everybody's lazy. Being smart allows you to be lazy
without adversely affecting your economic status.