#7 – Rats
Rats can remember certain routes, respond to smells, and jump through hoops. Although they are not among the most popular animals, they are regarded as highly intelligent by scientists. As a matter of fact, a study in Canada gathered some of the greatest scientists of the world, all of which participated in constructing a special maze that would test the critical thinking skills of a rat. This test was originally planned to last for 3 days, but it was over in just a couple of minutes, as the rat managed to avoid all obstacles and escape the maze quickly.