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盘点：世界上最聪明的动物们

黑猩猩和人类一样，要在不到一秒的时间内记住数字的位置，然后研究人员会让他们回忆并指出数字的位置。成年黑猩猩和人类大学生发挥的差不多，然而未成年黑猩猩的准确度令前两组望尘莫及。研究人员认为这些年轻的黑猩猩使用的是一种图形记忆方法，即使它们只瞥了一眼图形，也能用极高的准确度回忆起来。

Goats 山羊

Scientists have thought for a long time that goats are far smarter than their unassuming demeanor leads many of us to believe. Finally, a group of researchers in Australia decided to put these barn animals to the test. To do so, they set up a contraption that held fruit at the end. To access the tasty treat, the goats had to use their teeth to drag a rope down, which activated a lever they had to lift up with their mouths. If they could figure all that out, the fruit was theirs.

科学家长期以来都认为，看似低调的山羊实际上比我们想象的还要聪明。有一群澳大利亚的研究人员终于决定对山羊进行测试。测试用到了一个精巧的装置，里面放着水果。为了吃到美味的水果，山羊必须要用牙拽下绳子，绳子会激活一个杠杆，然后山羊需要用嘴将杠杆抬起。如果它们能搞定这些的话，里面的水果就是它们的了。

Nine out of 12 goats mastered the task after around four tries. When the researchers had all the goats try again 10 months later, the majority still remembered how to work the system.