Navigation Links
Ladybugs may be cute, but watch out when they get near wine

Modern man"s earliest known close ancestor was significantly more apelike than previously believed, a New York University College of Dentistry professor has found.

A computer-generated reconstruction by Dr. Timothy Bromage, a paleoanthropologist and Adjunct Professor of Biomaterials and of Basic Science and Craniofacial Biology, shows a 1.9 million-year-old skull belonging to Homo rudolfensis, the earliest member of the human genus, with a surprisingly small brain and distinctly protruding jaw, features commonly associated with more apelike members of the hominid family living as much as three million years ago.

Dr. Bromage"s findings call into question the extent to which H. rudolfensis differed from earlier, more apelike hominid species. Specifically, he is the first scientist to produce a reconstruction of the skull that questions renowned paleontologist and archeologist Richard Leakey"s depiction of modern man"s earliest direct ancestor as having a vertical facial profile and a relatively large brain ?an interpretation widely accepted until now.

Dr. Bromage"s reconstruction also suggests that humans developed a larger brain and more vertical face with a less pronounced jaw and smaller teeth at least 300,000 years later than commonly believed, perhaps as recently as 1.6 million to one million years ago, when two later species, H. ergaster and H. erectus, lived. Dr. Bromage presented his findings today at the annual scientific session of the International Association for Dental Research in New Orleans.

The fragmented skull Dr. Bromage reconstructed was originally discovered in Kenya in 1972 by Dr. Leakey, who reassembled it by hand and dated it at nearly three million years of age, an estimate revised to 1.9 million years by scientists who later discovered problems with the dating.

"Dr. Leakey produced a biased reconstruction based on erroneous preconceived expectations of early human appearance that violate d principles of craniofacial development," said Dr. Bromage, whose reconstruction, by contrast, shows a sharply protruding jaw and a brain less than half the size of a modern human"s. These characteristics make the 1.9 million-year-old early human skull more like those of two archaic, apelike hominids, Australopithecus and early Paranthropus, living at least three million and 2.5 million years ago, respectively.

Dr. Bromage developed his reconstruction according to biological principles holding that the eyes, ears, and mouth must be in precise relationship to one another in all mammals.

"Because he did not employ such principles, Dr. Leakey produced a reconstruction that could not have existed in real life," Dr. Bromage concluded.


'"/>

Source:American Chemical Society


Related biology news :

1. Loosen leash on cancer protein watchdog, researchers say
2. Hopkins researchers develop new tool to watch real-time chemical activity in cells
3. Researchers use multiphoton microscopy to watch chromosomes in action
4. Catching cancers spread by watching hemoglobin
5. After the yeast is gone bacteria continue to develop flavor of sparkling wine
6. Grape expectations for healthier wine
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/11/2017)... 11, 2017 Crossmatch®, a globally-recognized leader ... today announced that it has been awarded a ... Activity (IARPA) to develop next-generation Presentation Attack Detection ... "Innovation has been a driving force within Crossmatch ... allow us to innovate and develop new technologies ...
(Date:4/5/2017)... 2017  The Allen Institute for Cell Science today ... one-of-a-kind portal and dynamic digital window into the human ... first application of deep learning to create predictive models ... and a growing suite of powerful tools. The Allen ... future publicly available resources created and shared by the ...
(Date:3/30/2017)... 2017  On April 6-7, 2017, Sequencing.com will host ... hackathon at Microsoft,s headquarters in Redmond, ... on developing health and wellness apps that provide a ... Genome is the first hackathon for personal genomics ... companies in the genomics, tech and health industries are ...
Breaking Biology News(10 mins):
(Date:5/22/2017)... ... 2017 , ... Stratevi, a boutique firm that partners with healthcare companies to ... an office in downtown Boston at 745 Atlantic Ave. , “We are seeing ... evidence on the value they provide, not just to patients, but also payers. Having ...
(Date:5/22/2017)... , ... May 22, 2017 , ... ... that it is exhibiting in booth B2 at the Association for Pathology ... 22-25. , In addition to demonstrating its Cancer Diagnostic Cockpit and Consultation ...
(Date:5/21/2017)... ... May 20, 2017 , ... CNSDose is ... trial and error process by finding the right antidepressant faster. CNSDose speeds ... doctor-patient relationship through a personalized approach to treatment. , A peer-reviewed ...
(Date:5/19/2017)... ... May 19, 2017 , ... The University City Science ... technologies ripe for commercialization, and who are affiliated with the 21 partner academic ... proposals. QED, now in its tenth round, is the first multi-institutional proof-of-concept program ...
Breaking Biology Technology: