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Ronald I. Orenstein writes;

>A question; would the degree of horizontal vs vertical movement suggest that
>an ankylosaur would have been aiming mainly at an attacker's legs (with, I
>suppose, the aim of throwing it off balance) rather than generally flailing
>away at it (in which case rotation in three dimensions would be more useful)?

Since the club probably evolved for intraspecies combat first and
foremost, the side to side makes sense.  Any anti-predator function
would be icing.  On the whole, I agree with Ron's statement.


"Don't Panic."