I find it highly unlikely that people share links all the time here on medium, me included, but somehow you're not able to. "Copy and paste" doesn't work for you? I'm not buying it.

Even if there are studies, I doubt the results you claim until I read the studies and see the summary and context.

People change from conservative to liberal and vice versa during their lifetimes. Very many people become more conservative as they get older. Do their gray matter concentrations change?