Outstandingly bright — with eyes that strikingly resemble ours — yet their ancestors split from mammals and birds 600 million years ago.
Just as vertebrates differ greatly in intelligence and sentience, invertebrates may differ greatly too.
You’ve heard about salmon, whales, and sea turtles. Now learn what the clumsy-looking elephant seal accomplishes navigation-wise.
Neurons in a rat’s whiskers “represent multiple stimulus features in a tiled and continuous manner, thus encoding large regions of a complex sensory space.”
What about shrimp? Their brains turn out to have memory and learning centers, which has triggered an evolution squabble.