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RE: sauropod lung collapse

> This doesn't clinch the case, does it?   Plenty of large animals like
> hippopotamuses and, yes, whales manage to spend quite a bit of time deep
> under water without having collapsed lungs and do their breathing when
> they're safely above water.

They don't breathe when the nostrils are just at the surface and the lungs 
are 10 m below it. They keep themselves closer to horizontal when they 

As for hippos... "large"... very few adult sauropods were smaller than a 
hippo! :o)

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