The tiny Rufous hummingbird is able to recall where and when it last dined on the sweet nectar of flowers, according to new research, proving bird brains are smarter than first thought.

• 一项新的研究显示，小小的棕煌蜂鸟能够回忆起自己上一次在何时何地进食甜蜜的花蕊，从而证明鸟的大脑比人们最初想像的还要聪明。