Our human ancestors weren’t always so special

(HealthDay News) — A 54-million-year-old skull has yielded the first detailed images of a primitive primate brain. The 1.5-inch-long skull was from an animal species called Ignacius graybullianus, part of a group of primates known as plesiadapiforms. They evolved in the 10 million years after dinosaurs disappeared from the Earth. Scientists said the species was similar to modern primates in terms of diet and tree-dwelling, but its brain was one-half to two-thirds the size of the brain of the smallest modern primates.

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