The Human Edge

TheHuman Edge

OurInner Story

Afteryears of searching our central story, Neil Shubin in 2004 foundfossils of a fish that he believes it is our most important ancestorsbecause it has structures such as shoulders, legs, neck, elbows, anda wrist that turned out to be a human body. He named his findings asTiktaalik, which said everything people have, are a version of thingsseen in fish. Shubin says that some things we have Tiktaalik do nothave, but DNA is present in this creature.

OurInner Yeast

Accordingto Gavin Sherlock, who is a geneticist at Stanford University, manyof the parts necessary for making yeast are also important for makinghuman beings. He says that approximately one-third of the yeast geneshave a version that is directly equivalent to that exists in humans.Sherlock also says that these genes are very similar in such a waythat they can be exchanged one for the other. He concludes by sayingthat yeast and human beings share a lot in common. For instance,yeast consumes sugars and makes hormones just the same as the humandoes. He also adds by saying yeast do have sex for reproduction,which is similar to human.

HowWe Got a Body

Shubinpoints out that combination of single-celled creatures such asbacteria and other microbes formed the first bodies. More formsemerged with time. He also points out that an ancient worm has thesame coordinate axes as human beings.

WhatMakes Humans Different

DespiteAustralopithecus going extinct, they were more apelike than modernhumans were. According to Shubin, a bone, muscle or a gene were notfactors that made us human, but possibly, it was the genetics and thephysiology. He added by saying that human species are made unique bythe culture they build with their bones, muscles and brain.

Workscited

NPR.ORG,`: FindingOur Inner Fish`.N.p., 2012. Web. 3 Dec. 2015.