Monday, March 9, 2009

A Dino Squats

Here is some paleo-buzz about the find of impressions of a sitting therapod. Therapods were bipedal, according to tracks. So no one knew just how the creatures held their hands, or what their stance was. This new find is interpreted as showing come characteristics of birds, specifically the position of the hind legs and the inward turned hands which were pressed into the mud to balance the animal while it sat.

The findings are recorded here, and relevant graphics show both the prints and an artists impression:

The conclusion drawn from these sandstone imprints is that it holds its "hands" like a bird (facing inward), and sits like a bird, demonstrated in the drawing.

In fact, PZ Meyers says, "very birdlike". Birdlike? The sitting posture doesn't resemble that of this bird:Nearly as much as it resembles the following mammals, since it sits with its "ventral region" (butt) on the ground:Possibly the idea is that the creature sits with its feet under its belly:It's not enough to just report the facts of the find, it is essential that all possible inferences be drawn. The necessary inferences these days are any that can be related to dino-birds or bird-dinos, showing the inference of descent, and back-jamming into evolution. This is an example of stuffing inferences drawn from actual facts into the murky realm of descent from a single ancestor; an accumulation of evermore extrapolational evidence to be piled on the mountain.

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