Human Evolution

1. Mother of Man - 3.2 million geezerhood ago one(prenominal) fossil discovery above all has transformed views of how we became human. simply who was Lucy, and why is she so important to human evolution? Lucy was sight in 1974 by anthropologist Professor Donald Johanson and his student Tom discolor in a maze of ravines at Hadar in grisly Ethiopia. Johanson and Gray were out searching the scorched terrain for animal scrape up in the sand, ash and silt when they spotted a bantam fragment of arm swot. Discovery of a lifespan Johanson in a flash recognized it as be to a hominid. As they looked up the slope, they saw more bone fragments: ribs, vertebrae, thigh bone and a partial jawbone. They in conclusion unearthed 47 bones of a skeleton - nearly 40% of a hominid, or humanlike creature, that lived around 3.2 million years ago. Based on its small size, and pelvic shape, they concluded it was egg-producing(prenominal) and named it Lucy aft(prenomina l) Lucy in the Sky with Diamonds, the Beatles var. playing on the radio when Johanson and his team were celebrating the discovery screen at camp. An upright chimp Like a chimpanzee, Lucy had a small brain, long, dangly arms, short legs and a cone-shaped thorax with a large belly. But the complex body part of her knee joint and pelvis show that she routinely walked upright on both legs, like us.

This form of locomotion, known as bipedalism, is the wholeness nearly important difference between humans and apes, placing Lucy firm inside the human family. Bipedalism is the most distinctive, apparently earliest, defining peculiar(prenominal) of humans, says Johanson, now man ager of the Institute of Human Origins at a! zimuth State University. esteem from Afar Johanson named Lucys species Australopithecus afarensis, which means southern ape of Afar, after the Ethiopian region where Hadar is located. 3.5 million years ago, Australopithecus afarensis foraged for fruit, gaga and seeds in a mixture of savannah and woodland. It may in improver have obtained animal...If you want to get a full essay, engineer it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: write my essay