To look at them, squids and octopuses seem to have a lot in common.
level of intelligenceBut the last common ancestor between the two was around 300 million years ago. Since then, squids and octopuses have forged their own evolutionary paths, leading to some fascinating differences in their adaptations. And one of these, scientists have now discovered, is how they taste the world around them.
In the case of humans, these structures are neurotransmitter receptors found in the brain and muscles. In the octopus , they help describe the world around it. This makes a lot of sense. In other words, the receptor used to be involved in neurotransmission, but it evolved to help octopuses use their arms to search the seafloor and crevices for things they might like to eat.
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