KellanStec

Are primates really that closely related to us? I have had people tell me that it is demeaning to even consider the idea that we are related to any animal. Myself being an animal, I have no problem believing we came from a different animal. But how different are we from primates, really? Is it that much of a stretch to see the resemblances in our phenotypes, genotypes, and culture? (Yes, primates do have culture.)

I hadn’t thought about this much recently until I read an article on the Guardian detailing a primate closely related to chimpanzees found only in the Congo. Time also wrote about this in 2005. Initially all that was known about these animals was known through the locals describing “lion killers”. There isn’t much evidence for the primates killing large cats from what I can tell. From the evidence, the idea stops at legend.

There is another species of chimp living in the same area commonly known as Bonobo. The term is used to describe a type of “pygmy chimpanzee”, although they are not noticeably smaller than a normal chimp. The scientific term for the species is Pan paniscus. The species shares a common ancestor with the other chimps, Pan troglodytes. This common ancestor, then, shares a common ancestor with modern humans. This means that humans are more closely related to chimpanzees than chimpanzees are to gorillas.

I thought I should clear that up, because when I begin writing about some of the traits this species has, it would be easy to think that this species was more closely related to humans than the other species of chimpanzees, and this is simply not the case. To the left, you can see the phylogenic tree for primates. If you are wondering how we are able to map this tree, please read this.

The Bonobo were discovered in 1928 by American anatomist Harold Coolidge. The find was represented only by a skull, and was at first mistaken for an juvenile chimpanzee. We now know that they are a separate species.

There are a number of things that distinguish this species from the rest of its primate cousins. The Bonobo have a gait that is commonly upright in situations where they need to carry things, such as food or nest-building material. They seem to have much less problems accomplishing this than the other chimpanzees. They are able to walk upright about 25% of the time.

What got me interested, though is not what makes them different from other primates, but what makes them similar to us. It is not only the Bonobo and other chimps that share suprisingly similar characteristics with humans, but most of the closelt related primates do. If you’d like to read more about the similarities, see this page. It is very interesting to see that things we would normally consider human–maternal bonds, depression, guilt, shame, love–are not unique in humans at all. Even their sexual behavior is astonishingly similar.

I’d like to direct your attention to a talk that I watched on TED a while ago. Taken directly from the description:

Savage-Rumbaugh asks whether uniquely human traits, and other animals’ behaviors, are hardwired by species. Then she rolls a video that makes you think: maybe not. The bonobo apes she works with understand spoken English. One follows her instructions to take a cigarette lighter from her pocket and use it to start a fire. Bonobos are shown making tools, drawing symbols to communicate, and playing Pac-Man — all tasks learned just by watching. Maybe it’s not always biology that causes a species to act as it does, she suggests. Maybe it’s cultural exposure to how things are done.

Give it a watch. It’s very interesting.

Filed under: Science by kellanstec