QuoteFar as T Rex long duration as Apex predator,

Will you last six months?  No you will not.  Pick any random old time, likely it will be a critter you never heard of who will have you for lunch.

In the absense of man nature grows megafauna.  But dinos with sharp teeth in the 40-200 lb range were far more common than the big as a tank monsters like T-Rex.  One of them would be more likely to get you.

A Sabine Hossenfelder video makes it into the Diner.

It had to happen someday.

The video below explains Joe Rogan's audience.  If you compared the general genetic quality of the American population of 1880 to the quality of American DNA today there will be differences.  Medical care to keep the weak breeding has been around for a hundred years.  That is a few generations.  Sugar which was once as hard to find in the natural environment as gold has been around all that time.  Sugar became cheap, and is growing people like weeds.  Dickweeds to be exact.

New Study Reveals Sharp Decline in American IQ Scores as the "Reverse Flynn Effect" Takes Center Stage

The Reverse Flynn effect is more environmentally caused, and not due to hard science reasons I describe above.  Reasons I am sure everyone will prefer to be in denial of.