Hokkanen, in particular, with his estimate of 2,000,000 lbs. or thereabouts derived from bone structure analyses, is clearly left out in left field alone. The largest sauropods, of course, were around 360,000 lbs., far beyond the limits which Rauber, Economos, or I note for our present world. What it would take to kill mammoths and other megafauna with primitive weapons. Many scientists still insist that Indian ancestors killed all mammoths and all other North American megafauna as well with primitive weapons, the so-called Overkill hypothesis. A couple of pictures illustrate the absurdity of this aspect of standard theories regarding the Earth's history.
Extinction is the flip-side of evolution.
That is what puts archaeologists into untenable positions such as overkill . Recent traffic on several of the usenet science discussion groups has centered on problems reconciling ammonites, Carboniferous dragonflies and flora, and other archaic life forms with present constraints involving gravity. In other words, a lot of people are starting to notice these kinds of problems.