Along with humans, the monkey kind of animal is classified by scientists as a “primate.” Monkeys have strong, grasping hands and “feet” (actually a second pair of hands), while some have prehensile (or, grasping) tails. These creatures come in many different sorts...from large and dangerous gorillas to the smallest monkey of all:  the pygmy marmoset which weighs in at just over 3.5 oz!