Discovery by Stanford University researchers could challenge assumption that ability to ‘push’ water is a widely desired evolutionary traitFor the longest time,science has assumed that in order to run, swim, and sail,animals and humans must exert pressure on the ground, water or air around them to project themselves forward.
But a study published on Tuesday suggests that rather pushing water rearward, and jellyfish and lampreys – a species of snake-like,jawless fish also known as lamprey eels – pull” themselves forward by creating a region of low pressure in the water ahead of them.
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Source: theguardian.com