Monkeys fall into two categories. The first category of monkeys is Old World Monkeys, which are found in Asia and Africa. The second category of monkeys is New World Monkeys, which are found in South and Central America. In addition to living on different continents, one notable difference between the two categories of monkeys is that New World Monkeys have four more teeth than Old World Monkeys.
Between the two categories of monkeys, there are a total of two hundred and sixty-four different species of monkeys. Of these, the loudest species is the howler monkey. This species of monkey is so loud that it can be clearly heard from a full three miles away. The smallest monkey species is the Pygmy Marmoset. This species is so small that even when it's fully grown, it only measures five to six inches in length.
When people think of animals that can help disabled individuals, most instantly think of seeing-eye dogs. However, dogs aren't the only animals that can improve the quality of life for someone who is disabled. Monkeys can be trained to help people who have trouble moving around. Although it may seem unbelievable, monkeys can actually be trained to microwave food for people who have trouble doing it themselves!
In addition to being used in a wide variety of science experiments, monkeys have also been sent into space. The first monkey to ever go into space was Albert II, and his trip took place all the way back in 1949.