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...If we're wrong, then at least we it's not the first time assumed something wrongly...but I seriously doubt that ammonites with large and heavy shells that are upright would most certinaly topple, no?
'Ammoniten konnten ganz sicher nicht schwimmen. Das lässt sich mit den von Archimedes schon vor 2000 Jahren gefundenen Regeln der Hydrostatik sowie der Hebelge- setze ganz eindeutig nachweisen. Sie waren ausnahmslos Bodenbewohner und mussten sich somit kriechend fort- bewegen, auch wenn es mancher Thomas nicht so recht glauben mag - not my problem.'
'Ammonites were certainly unable to swim. This is proven, without a doubt, by the rules of hydrostatics (discovered by Archimedes more than 2000 years ago), as well as the principle of the lever (?). They were, without exception, benthic ('floor-residents') and therefore moved by crawling; if some people choose not to believe this, not my problem.'