Secretariat vs. American Pharoah

If you had a time machine and used it to transport athletes from 1973 into the present day, then dude, that's really a waste of such phenomenal technology.  But anyway, most of 1973's stars would look surprisingly inadequate in modern sports since the human body's limits just continue to evolve year after year.

I say "most," since Secretariat is the exception.  A tremendous machine.  I actually give credit to that horse who hung pretty closely to him for that first half-mile before Secretariat kicked it into overdrive.

Also relevant...