“The Tarsier is one of the smallest primates and lives in the forests of Borneo and Sumatra and the Philippines. Tarsiers have a maximum body length of 6⅓ inches and a 10½ inch tail. Their eyes are so large that they would be equivalent to grapefruit-sized eyes in a human being.

Tarsiers, along with animals from the genus Galago, are the only primates able to turn their heads through 180-degrees in each direction. Galagos, known as bush babies, also share the Tarsier’s large eye-to-body ratio. They can be found in sub-Saharan African forests.” [http://www.christiananswers.net/kids/biggest-eyes.html]

When seeing the picture of this small creature, I thought, "Hmm. They would probably make great pets. Or aliens. But then I read:

"Tarsiers have never formed successful breeding colonies in captivity, and when caged, tarsiers have been known to injure and even kill themselves because of the stress. [Wikipedia]

Some animals do better in captivity than others; some can be good pets, but others cannot. Not all of us handle stress well. A lot of this is based on genetics, although no one really wants to say this. The playing field is not level: we all have strengths and weaknesses, and, generally, great strengths are usually accompanied by great weaknesses. If you have parented a number of children, I do not have to convince you that some of your kids naturally handle stress better than others. Some people handle stress like it is nothing, others are upset at the mere mention of the word "change."