Another unexplained piece of evidence, at the end of the last ice age hundreds of species all went extinct on all the continents. There is no valid explanation for this.
species evolved to for life in tundra like conditions of extreme cold and dryness dying off when those conditions go away? Yeah that is a mystery
Some have attributed this to humans hunting them to extinction. Doesn't make sense, we tried to hunt the buffalo to extinction, mowing them down in great heaps so the Indians would lose them. How do you hunt a saber toothed tiger to extinction with those primitive weapons and much, much smaller tribes. Also, where is the archaeological evidence?
you mean the evidence that when human being came to settle an area the rate of extinction for big mammals rose?
Felisa A. Smith Rosemary E. Elliott Smith S. Kathleen Lyons, J. L. Payne Body size downgrading of mammals over the late Quaternary Science 20 Apr 2018:
M. Cardillo, G. M. Mace, K. E. Jones, J. Bielby, O. R. Bininda-Emonds, W. Sechrest, C. D. Orme, A. Purvis, Multiple causes of high extinction risk in large mammal species. Science 309, 1239–1241 (2005).
G. Ceballos, P. R. Ehrlich, A. D. Barnosky, A. García, R. M. Pringle, T. M. Palmer, Accelerated modern human-induced species losses. Sci. Adv. (2015).
R. Dirzo, H. S. Young, M. Galetti, G. Ceballos, N. J. B. Isaac, B. Collen, Defaunation in the Anthropocene. Science 345, 401–406 (2014)
S. K. Lyons et al., Of mice, mastodons and men: Human-mediated extinctions on four continents. Evol. Ecol. Res. 6, 339–358 (2004).
T. Surovell, N. M. Waguespack, “Human prey choice in the Late Pleistocene and its relation to megafaunal extinctions” in American Megafaunal Extinctions at the End of the Pleistocene, G. Hayes, Ed. (Springer, 2009)
R. E. Plotnick F. A. Smith, S. K. Lyons
The fossil record of the sixth extinction. Ecol. Lett. 19, (2016).
11,000 years ago, when human's first came to the America's the average mass of a non-human mammal in North America was about 200 pounds. Now it's about 15 pounds.
You would expect pelts and bones and all kinds of evidence. So since this theory has no evidence to support it
see above