There have been people shoveling this horse manure (in one form or another) for hundreds if not thousands of years.
I’ll give this person all the respect they deserve.
Hack, spit...
I was watching a show on the science channel just the other night that theorized a correlation climatic fluctuations and spurts of evolutionary brain size doubling every 400,000 years.
Apparently earth falls into gravitational resonance with Jupiter every 400,000 years that causes earth’s orbit to elongate by a few million miles.