The Ancient Pelvis - Mothering Forums
Forum Jump: 
 
Thread Tools
#1 of 2 Old 07-11-2013, 08:44 AM - Thread Starter
 
cynthiamoon's Avatar
 
Join Date: Nov 2009
Location: Denver, CO
Posts: 1,488
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Old but interesting news about the ancient pelvis. It's amazing how much smaller babies used to be than they are now! Is anyone out there an evolutionary scientist or otherwise well-read on how we've evolved our brains and pelvis in sync? I can't help but be in awe of how much trial and error it must have taken to favor the larger human brain and pelvis over the millennia. 

 

I know most would say that it's very rare today that a pelvis is too small for a baby, but does the fact that even those babies can survive via c-section mean we will no longer be able to co-evolve bigger and bigger brains/pelvises? 

 

 

Discovery Questions Intelligence of Human Ancestor

Pelvis dated to 1.2 million years ago shows our ancestors were born with bigger heads [than previously thought] 

 

 

 

November 18, 2008

A recently discovered female pelvis is changing minds about the head size of an ancient human ancestor, Homo erectus, and consequently revising notions about how smart they may have been. Found in Gona, Ethiopia, not far from the site that yielded the 3.2 million year old remains of the famed Australopithecus afarensi "Lucy," the pelvis indicates that Homo erectus, which lived in Africa roughly 2 million years ago, had a larger birth canal than originally suspected and could have given birth to babies with bigger brains.

Before the female pelvis was found, evidence from the pelvis of a juvenile male led researchers to project that the cranial circumference and capacity of newborn Homo erectus babies was 30 percent smaller than more recent projections based on the newly discovered pelvis.

Sileshi Semaw, a paleoanthropologist at the Stone Age Institute and Indiana University-Bloomington, and his colleagues assert that the head of a baby born from this Homo erectus could have been 318 millimeters in circumference. This is at the lower end of the spectrum of modern day human beings whose cranial circumferences at birth typically range from 320-370 millimeters. Semaw and colleagues present their findings in the Nov. 14 issue of Science. The research is funded in part by the National Science Foundation.

--Zina Deretsky, NSF

 

 

http://www.nsf.gov/news/news_summ.jsp?cntn_id=112620


Writing about life-long learning and discovery at: www.neoapprentice.com 

:: A neo-apprentice knows there are no true masters. 

 

25yo FTM to a Wiggle Panda diaper.gif, student teacher read.gif, newlywed love.gif 

cynthiamoon is offline  
#2 of 2 Old 07-26-2013, 01:40 PM
Administrator
 
cynthia mosher's Avatar
 
Join Date: Nov 2001
Location: An Arabian kingdom far far away
Posts: 28,860
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)

Very interesting. Thanks for sharing!


cynthia mosher is online now  
Reply

Quick Reply
Message:
Drag and Drop File Upload
Drag files here to attach!
Upload Progress: 0
Options

Register Now

In order to be able to post messages on the Mothering Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off