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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…)

What Did T. Rex Eat? Each Other.

By Guest PostOctober 20, 2010Sciencecanada, cannibalism, carnivore, dinosaurs, fossil, gregory erickson, john horner, largest terrestrial carnivores, majungatholus, mammal tooth, marks, museum, nick longrich, North America, paleontologists, philip currie, scavengers, t rex, tyrannosaurus rex, united states, yale researcher

T. rex was the only big carnivore in western North America 65 million years ago that was capable of making such large gouges. Image credit: Nicholas Longrich

It turns out that the undisputed king of the dinosaurs, Tyrannosaurus rex, didn’t just eat other dinosaurs but also each other. Paleontologists from the United States and Canada have found bite marks on the giants’ bones that were made by other T. rex, according to a new study published online Oct. 15 in the journal PLoS ONE.

While searching through dinosaur fossil collections for another study on dinosaur bones with mammal tooth marks, Yale researcher Nick Longrich discovered a bone with especially large gouges in them. Given the age and location of the fossil, the marks had to be made by T. rex, Longrich said. “They’re the kind of marks that any big carnivore could have made, but T. rex was the only big carnivore in western North America 65 million years ago.” (more…)

New Study Shows How Tortoises, Alligators Thrived in High Arctic Some 50 Million Years Ago

By Guest PostAugust 24, 20101 commentSciencealligators, arctic circle, arctic climate, arctic temperatures, climate change, coryphodon, ellesmere island, eocene period, flight recorder, fossil, fossil bone, greenland, henry fricke, hippo-like mammal, howard hutchison, jaelyn eberle, john Humphrey, logan hackett, mammals, michael newbrey, oxygen isotope ratios, pleistocene period, quebec, saint lawrence river drainage, tooth enamel, tortoises

A new study of the High Arctic climate roughly 50 million years ago led by the University of Colorado at Boulder helps to explain how ancient alligators and giant tortoises were able to thrive on Ellesmere Island well above the Arctic Circle, even as they endured six months of darkness each year.

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Google turned evil :-)

By ShamsMay 20, 20092 commentsScienceapes, evolutionary history, fossil, Frankfurt, Germany, humans, monkeys

It looks like. With this logo, it says something like this:

‘If you don’t search here, then I am going to jump on you’. 🙂

(more…)

Tag Archives: fossil

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

What Did T. Rex Eat? Each Other.

New Study Shows How Tortoises, Alligators Thrived in High Arctic Some 50 Million Years Ago

Google turned evil :-)