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Pneumatic vertebrae in sauropods were possibly interesting trivia, but sauropods were an evolutionary dead end and so their vertebrae couldn’t tell us anything important about evolutionary success. These attitudes may not have been universal, but they were certainly prevailing. I had the good ...
A nice simple explanation would be that that all the elements areSupersaurusand that’s just whatSupersaurusis like: super-long neck, forequarters proportionally larger than hindquarters, perhaps in a slightly more convergent-on-brachiosaurs way. That would work just fine were it were not that ...