We have always been fascinated by clever animals, especially those that can do the things we do, like using tools or solving complex problems. Here’s a list of some of the smartest species out there.
For years rats have been used in scientific experiments. They can find their way through mazes, solve problems to get to food and an experiment in 2006 would suggest that they understand cause and effect. In Chinese culture rats are revered for their cunning and resourcefulness.