Interesting start, and I hope they receive more funding, but I can’t see how a two year (max participant length of 4yrs) period is near long enough to confirm that these changes are solely due to age and not some other, personal factors or generational factor.
For those interested in the actual study (non-paywalled) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7301912/
I mean the video shows him going into an abandoned mining town they’re now using as a military training ground, not like he walked into a military base