The study relied on electrodes placed in the brains of parrots and songbirds and tracked the behavior of neurons in a region ...
“We don’t have a precise definition of a brain,” he said. Scientists home in on the brain’s evolutionary origins by sorting out the animals without brains. Sponges have no neurons, so they are easy to ...
An elephant's brain is four times heavier than a human's. But as a percentage of its body mass it ranks at the bottom. The data used in the video is from UCLA Statistics and the images are from ...