Lucy
The discovery of Lucy is our oldest and most complete human ancestor. She is less than 3.8 million years old hominid of Australopithecus afarensis, which was discovered in November 24, 1974 by Donald C. Johanson and Tom Gray in the Hadar region of Ethiopia.
They named her Lucy in reference to the well-known Beatles song "Lucy in the Sky with Diamonds", which played over and over as they celebrated their findings.
This uncovering of Lucy was very fascinating and answered many questions to our human evolution.The search for human ancestry has been ongoing for the past century since the publication of Charles Darwin’s “Origins of the Species”. As more evidence about the ‘branches’ of the evolutionary tree of many distinct animals and species, researchers were able to think of better hypotheses about humans’ ancestors. This scientific hard effort, involving researchers from many variety of fields from Evolutionary Biology to Paleontology. As many pieces of the puzzles were revealed, so grows the great knowledge about the history of life on our planet.
In 1972, a group of researchers led by Donald Johanson, founding director of the “Institute of Human Origins” of Arizona State University, sets out to discover a hypothesized human ancestor, Lucy, in the Hadar Formation in Ethiopia. Donald Johanson’s group hypothesized the existence of a biped human ancestor, with the great ability to walk upright like humans, which of Lucy having a relatively small cranial capacity like that of an ape. This creature, Donald Johanson hypothesized, would be a “missing link” between the apes and humans, and prove that the populated humans developed the ability to walk upright before developing higher intelligence, which was opposed to the common b...
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...vejoy, the team’s anatomy expert, hypothesized that the bone crushed and fossilized misshapen, causing the position of the bones to seem as if they “flared up like a chimp’s.” This initial conclusion might have been the correct one, but Lovejoy was part of Johanson’s team, and as such, his analysis was done under Johanson’s influence. Johanson concluded that this chimp-like bone was an illusion, and the reconstruction that followed resulted in a bipedal pelvis. It is unclear how certain the researchers can be that the final result was the original shape of the bone, but one thing is clear – the reconstruction was done under the influence of the initial and final conclusion. When the assembly and analysis of the bones are done by a team of researchers already pre-disposed to a specific hypothesis, it is little wonder that the evidence ends up fitting the hypothesis
Humanity became fascinated with the idea of evolution with the work of Charles Darwin and the Scientific Revolution. People began hunting for fossils that would prove that man had an ape derived ancestry (Weiner, 1955). After various years of searching, a piece of physical evidence was found in England that was said to confirm the theory of evolution (Weiner, 1955).This confirmation came from Charles Dawson’s discoveries from 1908, that were announced publicly in 1912 (Thackeray, 2011). Dawson was believed to have found the fossil remains of the “missing link” between ape and human evolution, the reconstructed skull of Piltdown man (Augustine, 2006). The material was found in stratigraphical evidence and animal remains that were, at the time, adequate enough to confirm the antiquity of the remains (Weiner, 1955). In 1915, another specimen, Piltdown man II, was found further proving this theory (Augustine, 2006). However, this was merely a hoax proven by fluorine relative dating in 1953; the artifacts and bone fragments discovered turned out to be altered to fit the proposed scenario (Augustine, 2006). The skull found was actually composed of a human braincase that was younger than the complimentary orangutan lower jaw (Falk, 2011). Both sections of the skull had been stained to appear to be from the same person of the same age (Falk, 2011).The perpetrator of this act was never caught and there are many theories proposed for the motive of this hoax (Augustine, 2006). Many people have been taken into consideration for this crime, such as Chardin, Woodward, Hinton, and Dawson (Augustine, 2006). Nevertheless, the evidence that proves that Dawson is guilty of this crime against anthropology is quite substantial compared to the evidence...
Over the last few hundred years, more and more has been added to the world’s fossil collection, fossils from all over the world. New theories have been created and old theories have almost been proven about the evolution of man. For example, we have proof that different species of man existed with certain types of DNA sequences and instincts, some we may not have anymore, or some that other species did not have back then. Even though it is subjected to much debate, one of the most widely accepted theories however, is that Homo sapiens interbred with the slightly more primitive species of man, the Neanderthal.
A study performed by Martin Hausler and Peter Schmid of the University of Zurich, Switzerland, appeared in the October 1995 issue of Journal of Human Evolution, igniting controversy over the 1974 Australopithecus discoveries in Hadar, Ethiopia. The most famous of the Hadar specimens is the 3-million-year-old skeleton, “Lucy,” who was recovered by paleoanthropologist, Donald Johanson. In his article, Shreeve presents the methods and findings of Hausler and Schmid’s study as well as some counter arguments from other scientists in the field.
Wilford, J. (2004).Another Branch of Early Human Ancestors Is Reported by Scientists. [Online], March. Available at: http://gateway.proquest.com [Accessed 28 March 2004].
In a search to find our ancestors, several anthropologists have found evidence to support their conclusions. In the films about Don Johanson's discovery of Lucy in Hadar, one may be very intrigued by the first film but very disturbed by the second film.
On November 24, 1974, an American Anthropologist by the name of Donald Johanson and his research team, made a ground-breaking discovery that caused a mass dispute in human evolution. Dr. Johanson documented in his book, Lucy The Beginning Of Mankind, the discoveries he and his team have come across. Dr. Johanson and his team discovered a skeleton of a hominid, dated between 3.9 to 3 million years old (164). The hominid, which they referred to as Lucy, was discovered while surveying Hadar, in the Dafar region of Ethiopia (164-166). Lucy’s discovery, a 41% complete human ancestor caused a controversial alteration in the human origins. Lucy was the oldest human ancestor. During the following year, Johanson’s team discovered fossilized remains
The human archaeological record is a long and undefined story that may be the most complex question researched today. One of the big questions in human history is the disappearance of the Neanderthal people from the archaeological record around 30,000 BP. While for thousands of years Neanderthals and Anatomically modern humans crossed paths and perhaps lived in close relations, we have yet to really understand the degree to which they lived together. My hypothesis is that these two hominids, Neanderthals and Anatomically Modern Humans, interbred exchanging genes after Modern Humans dispersed from Africa and creating like cultures and material remains. The differences between Neanderthal and Modern humans are not only physical but also genetically evolved and this research will determine an estimated amount of admixture between the two groups.
Australopithecus afarensis who existed 3.5 million years ago and a 4.4 million year old skeleton of an Ardipithecus ramidus are the closest science has come to discovering the human lineage. Shattered Ancestry an article written by Katherine Harmon discusses the remains of two hominids found within Ethiopia. These skeletal remains have created a huge controversy within the topic of evolution questioning many assumptions that have been made referencing the human lineage. The skeleton of the Australopithecus afarensis was named Lucy and was discovered in 1974. The evidence of her walking upright on her two feet essentially guaranteed her a spot in the human lineage line. Lucy was a chimplike ape that was said to walk upright making scientists believe the human ancestry was simple. The complete skeleton found in Ethiopia of an Ardipithecus ramidus named Ardi completely changed all assumptions made from scientists about the complexity of the human lineage. These remains have encouraged researches that the human line is not the only lineage to have evolved but the chimpanzee line has undergone drastic changes as well. There are many traits that researchers have always directly linked to the human lineage however since these discoveries occurred researchers are reconsidering. The recent discoveries that have shattered what has always suggested what linked a species to the human lineage have changed the certainty of whether it is possible to confidently identify the human’s last common ancestor. Majority of scientist had forgotten that there would have been many hominid species living together at one time. New theories have been suggested since scientists revealed that the foot of a hominid found called the Burtele site was found ju...
Stringer, C. B. & Hublin, J-J. (1999). New age estimates for the Swanscombe hominid and their significance for human evolution. Journal of Human Evolution 37, 873–877.
The coccyx, found in humans, is a remnant of tail left over from our monkey ancestors. Just looking at a monkey, you can see the relation to humans: their nails and the way they grasp objects with their hands. Monkeys are primates just like humans are. We did no evolve from the modern monkey, but we have a common ancestor with monkeys existing today. Before 23 million years ago, monkeys were colorblind. Three opsins are required to see full range of light. If only two are present, this animal would be colorblind. Unlike monkeys, humans stand up on two feet. Neil Shubin looks at bones of an ancient monkey that walked on two legs (it is bipedal). This monkey, Lucy, is bipedal, yet primitive and not human. Lucy tells us when our ancestors began walking on two legs, around 4.4 million years ago. The fossil Ardipithecus tells us why our ancestors began walking on two legs. Ardi’s feet she walked on had a big toe that could grasp. Shubin believes Ardi disproves the past theory that mammals began walking on two feet with climate change because she walked on two feet before climate change millions of years ago. With the study of fossils, scientists find the human back goes wrong a lot. Bad backs of humans are connected to our monkey ancestors. The architecture of the brains of fish and humans are found to be very parallel structures, too. Both human and shark
The species A. afarensis is one of the better known australopithecines, with regards to the number of samples attributed to the species. From speculations about their close relatives, the gorilla and chimpanzee, A. afarensis’ probable social structure can be presumed. The species was named by Johanson and Taieb in 1973. This discovery of a skeleton lead to a heated debate over the validity of the species. The species eventually was accepted by most researchers as a new species of australopithecine and a likely candidate for a human ancestor.
Bipedalism had many advantages, but it also had many disadvantages and provided dangers to early hominids. Some of these disadvantages included i...
In my visit to the American Museum of Natural History (AMNH), I observed many interesting things concerning the issue on evolution and natural selection. An example of evolutionism I saw in the AMNH was the Hall of Human Biology and Evolution. This hall concentrated on human evolution and how certain traits arose through successful generation—such as the change in the skeletal system as a result of walking upright. Fossils of Australopithecus afarensis, which is believed to be the earliest human relative, are dated back nearly 4 million years.
“The scientific study of how humans developed did not begin until the 1800s in Europe. Until that time, people relied on religious explanations of how humans came into existence. Starting in the 1500s a scientific revolution began to sweep Europe. Thinkers started using scientific methods and experiments to try to better understand the world and the creatures living in it. Eventually these methods were turned to the question of human origins” (The Nature Of Human Origins, 1). Earth made it possible for species to change over time because Ancient Earth provides ability to plenty of time.The Homo Sapien a is very complex creature. The species started off very simple by living in caves and surviving with little food and then later evolved into a species that were able to do many more complex things. The first species was Sahelanthropus tchadensis They were one of the most simple humans in that time period and on. They had very small skulls compared to Homo Sapiens today and their motor skills were just the same. We have evolved and changed for the better both mentally and physically. The Evolution of Homo Sapiens started off simple, such as the Neanderthals, and now we are the most advanced species to ever walk the planet so far.
Orrorin tugenensis is known to be the second oldest hominin ancestor annd possibly related to modern humans. It was also known as the “Millennium Man” because the Orrorin tugenensis was fou...