{"fact":"Despite not having a layered cortex like mammals, a crow's brain has twice the number of neurons as a primate brain of the same mass, contributing to its remarkable intelligence.","context":"With this independently evolved endbrain design, the corvid brain affords twice as many neurons as a primate brain of equal mass [20], adding up to enormous processing powers in a small and densely packed ‘birdbrain’ [21].","source":"Andreas Nieder, Inside the corvid brain—probing the physiology of cognition in crows, 10.1016/j.cobeha.2017.02.005","index":11}