Giant ‘sea monsters’ evolved big bodies to offset long necks being a total drag

Scientists have discovered that having a large body provided a much-needed mobility boost to extinct marine reptiles with long necks.

The new research, which debunked the long-standing idea that there’s an optimal body shape amongst marine animals to make their bodies more streamlined underwater, found that an animal’s body size is actually more important than its body shape when it comes to the energy economics of swimming.

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