Navigation Links
Society bloomed with gentler personalities and more feminine faces

DURHAM, N.C. -- Modern humans appear in the fossil record about 200,000 years ago, but it was only about 50,000 years ago that making art and advanced tools became widespread.

A new study appearing Aug. 1 in the journal Current Anthropology finds that human skulls changed in ways that indicate a lowering of testosterone levels at around the same time that culture was blossoming.

"The modern human behaviors of technological innovation, making art and rapid cultural exchange probably came at the same time that we developed a more cooperative temperament," said lead author Robert Cieri, a biology graduate student at the University of Utah who began this work as a senior at Duke University.

The study, which is based on measurements of more than 1,400 ancient and modern skulls, makes the argument that human society advanced when people started being nicer to each other, which entails having a little less testosterone in action.

Heavy brows were out, rounder heads were in, and those changes can be traced directly to testosterone levels acting on the skeleton, according to Duke anthropologist Steven Churchill, who supervised Cieri's work on a senior honors thesis that grew to become this 24-page journal article three years later.

What they can't tell from the bones is whether these humans had less testosterone in circulation, or fewer receptors for the hormone.

The research team also included Duke animal cognition researchers Brian Hare and Jingzhi Tan, who say this argument is in line with what has been established in non-human species.

In a classic study of Siberian foxes, animals that were less wary and less aggressive toward humans took on a different, more juvenile appearance and behavior after several generations of selective breeding.

"If we're seeing a process that leads to these changes in other animals, it might help explain who we are and how we got to be this way," said H

Contact: Karl Leif Bates
Duke University

Page: 1 2

Related biology news :

1. Geological Society of America Cordilleran section meets in the heart of Mexico
2. American Society of Plant Biologists honors early career women scientists
3. John A. Kaufman named 2012 Dotter Lecturer by Society of Interventional Radiology Foundation
4. Registration open for the Ecological Society of Americas 2012 Annual Meeting in Portland, Ore.
5. European Society of Human Reproduction and Embryology 28th Annual Meeting -- Istanbul
6. The American Society for Microbiology honors Ellen Jo Baron
7. The Genetics Society of America announces DeLill Nasser Travel Award recipients
8. The American Society for Microbiology honors Bess B. Ward
9. The American Society for Microbiology honors I. Kaye Wachsmuth
10. The American Society for Microbiology honors Geoffrey L. Smith
11. The American Society for Microbiology honors Susan Sharp
Post Your Comments:
Related Image:
Society bloomed with gentler personalities and more feminine faces
(Date:9/28/2015)... 28, 2015 CLEAR, the leading ... expedited traveler service is coming to Austin-Bergstrom ... bringing a frictionless experience, serious speed and ... "CLEAR offers our travelers an expedited security ... Jim Smith , Executive Director, Austin-Bergstrom ...
(Date:9/28/2015)... JOSE, Calif. , Sept. 28, 2015 ... of human interface solutions, today announced that Lenovo has ... touch fingerprint sensor, FS4202, for its latest smartphone, the ... secure, password-free access to unlock the device and provide ... The feature-rich Natural ID FS4202 sensor ...
(Date:9/10/2015)... This report provides detailed descriptions of the sensor types ... types that will dominate in the future. Many product ... technology hype curve in the last five years before ... all of them is the prominence of sensor options ... Sensors collect data about the physical and chemical properties ...
Breaking Biology News(10 mins):
... Society today commends President Obama,s decision to sign a ... scientific evidence is used in the development of solutions ... memorandum rightly places science at the forefront of informing ... of solutions to issues such as enhancing energy security, ...
... of proteins, the molecular machines that drive all life, also ... study, in the journal Structure , reveals that after ... of innovation. The active regions of many proteins, called domains, ... host of structures that had never been seen before. This ...
... to treat critical limb ischemia in peripheral arterial ... thwarted by restenosis (the re-narrowing of the artery ... need for repeat treatments and the continued progression ... and amputation. Interventional radiologists have been studying a ...
Cached Biology News:
(Date:10/9/2015)... Oct. 9, 2015  Pulmatrix, Inc., (NASDAQ: PULM ) ... investor conferences. th Annual BIO Investor ... (2:00 pm EDT). --> th Annual ... am PDT (2:00 pm EDT). --> Pulmatrix ... Growth Stock Conference on Thursday, October 15, 2015 at 8:30 ...
(Date:10/8/2015)... 2015  Sorrento Therapeutics, Inc. (NASDAQ:  SRNE; Sorrento), ... cancer and associated pain, announced today that Dr. Henry Ji, ... at the Aegis Capital Corporation 2015 Growth Conference ... Corporation 2015 Growth ConferenceDate:Friday, October 9, 2015Time:10:00 to ... The Wynn in Las Vegas, NV , ...
(Date:10/8/2015)... , October 8, 2015 ... .   --> Goldman Small Cap ... the small cap and microcap sectors, announced today ... report on PharmaCyte Biotech, Inc. (OTCQB - PMCB), ... on developing and preparing treatments for cancer and ...
(Date:10/8/2015)... 8, 2015 /PRNewswire/ - RepliCel Life Sciences Inc. (OTCQB: REPCF) ... on the development of autologous cell therapies, today announced its ... taking place in the month of October: ... RepliCel will be presenting at the annual Partnering ... Mesa to be held October 7-9 in ...
Breaking Biology Technology:
... /PRNewswire-FirstCall/ - YM BioSciences Inc. (NYSE YMI, TSX:YM), today announced that ... units at an issue price of US $1.20 for gross ... one common share and one half common share purchase warrant. Each whole ... until March 10, 2015 . , ...
... March 10 Bone Biologics, Inc. announced today ... shares from the Musculoskeletal Transplant Foundation (MTF). MTF now ... financing, MTF also provided a line of credit to ... by MTF that have allowed Bone Biologics, Inc. to ...
... ... ... ... ...
Cached Biology Technology:
ma. plate stack height 70mm...
Rotor for four tube-loaded buckets; ma RCF 2550g; sold without buckets...
CQCS kit for etra KR 4i , (other units)....
A compact, high-speed single tube reader unit designed for benchtop 2D barcode reading. The unit can be used with all of ABgene's 2D barcoded tubes, including the 2ml CryoCode tube....
Biology Products: