History may never repeat itself exactly, but you wouldn't know that from the spate of recent articles comparing our current economic plight to the worst economic contraction since the Plague.
Unfortunately, it is in the nature of the archaeological evidence, which is almost invariable only a sample of what once existed, that such figures will always be elusive.
The Grand Teton pronghorn are notable for the invariance of their migration path and the severity of its constriction at three critical spots, known as Trappers Point, the Red Hills, and the Funnel.