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Geologists Correct a Rift in Africa

EAST LANSING, Mich. — The huge changes in the Earth’s crust that influenced human evolution are being redefined, according to research published today in Nature Geoscience.

The Great Rift Valley of East Africa – the birthplace of the human species – may have taken much longer to develop than previously believed.

“We now believe that the western portion of the rift formed about 25 million years ago, and is approximately as old as the eastern part, instead of much younger as other studies have maintained,” said Michael Gottfried, Michigan State University associate professor of geological sciences. “The significance is that the Rift Valley is the setting for the most crucial steps in primate and ultimately human evolution, and our study has major implications for the environmental and landscape changes that form the backdrop for that evolutionary story.” (more…)

MU, ASU Researchers’ Discovery Could Change Views of Human Evolution

By Guest PostFebruary 13, 2011Scienceardipithecus ramidus, australopithecus afarensis, brains, carol ward, discovery, donald johanson, ethiopia, feet arches, foot bone, fossil, fossil skeleton, hadar, hominids, human evolution, human like arches, human like walking, human locomotion, human origins, human species, humans, jaws, lucy, metatarsal, million year old, predators, predecessor, shock absorbing abilities, william kimbel

*3.2 million-year-old human predecessor had arches in feet*

COLUMBIA, Mo. – Feet arches give humans a spring in their steps, shock absorbing abilities, and stiff platforms to propel themselves forward, allowing them to walk upright consistently. Now, researchers at the University of Missouri and Arizona State University have found proof that arches existed in a predecessor to the human species that lived more than 3 million years ago. This discovery could change scientists’ views of human evolution. The study is being published this week in Science.

Carol Ward, an MU researcher in the Department of Pathology and Anatomical Sciences at the MU School of Medicine, and William Kimbel and Donald Johanson, director and founding director of the Institute of Human Origins at Arizona State University, studied a 3.2 million-year-old fourth metatarsal of Australopithecus afarensis. A team from the Institute of Human Origins and National Museum of Ethiopia led by Kimbel discovered the fossil in Hadar, Ethiopia. The species is often referred to as “Lucy,” the nickname of the most complete fossil skeleton of the species to be discovered. (more…)

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Geologists Correct a Rift in Africa

MU, ASU Researchers’ Discovery Could Change Views of Human Evolution