Sauropod hypothesis: the base of the tail of sauropods was always more less horizontal. That is, the keystoning of the sacrum predicts the angle of the back from the ground. Prove me wrong @mike and @ScottHartman.


@john @ScottHartman Well, the keystoning is real and ubiquitous. But I am more inclined to think that the base of the tail was typically inclined somewhat upwards. See discussion at

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