27 JUL 2018 by ideonexus
Young Apes Resemble Human Children
Hartmann, in his work on the Anthropoid Apes (289, p. 301), quotes, approvingly, the words of Vogt: ‘When we consider the principles of the modern theory of evolution, as it is applied to the history of development, we are met by the important fact that in every respect the young ape stands nearer to the human child than the adult ape does to the adult man. The original differences between the young creatures of both types are much slighter than in their adult condition : this assertion, ma...Folksonomies: evolution child development
Folksonomies: evolution child development
12 DEC 2017 by ideonexus
The Power of Fire
A signi12 DEC 2017 by ideonexus
The Disruptive Nature of Homo sapien's Rapid Rise to Apex...
Genus Homo’s position in the food chain was, until quite recently, solidly in the middle. For millions of years, humans hunted smaller creatures and gathered what they could, all the while being hunted by larger predators. It was only 400,000 years ago that several species of man began to hunt large game on a regular basis, and only in the last 100,000 years – with the rise of Homo sapiens – that man jumped to the top of the food chain. That spectacular leap from the middle to the top ...18 FEB 2015 by ideonexus
Human Self-Domestication
...the hypothesis of human self-domestication has recently been revived as a possible explanation of changes of human physical traits since the late Pleistocene. These changes include the reduction of body size and decrease in skeletal robusticity, modifications in cranial and dental features including reduction in cranial capacity, shortening of the facial region of the skull and maleruption of teeth, and reduction in sexual dimorphism. In contrast to earlier biological writings, other domes...23 SEP 2014 by ideonexus
Fireside Conversation Sparked Storytelling
Control of fire and the capacity for cooking led to major anatomical and residential changes for early humans, starting more than a million years ago. However, little is known about what transpired when the day was extended by firelight. Data from the Ju/’hoan hunter-gatherers of southern Africa show major differences between day and night talk. Day talk centered on practicalities and sanctioning gossip; firelit activities centered on conversations that evoked the imagination, helped people...19 JUL 2013 by ideonexus
Hand Axes as an Extended Phenotype
Two and a half million years ago, our small-brained ancestors evolved the ability to knock flakes from rocks to use as cutting edges. By doing so, they could also make the rocks themselves useful as choppers. This basic tool kit of flakes and choppers served the needs of hunting and gathering for a million years. Then, around 1.6 million years ago, a medium-brained African hominid (Homo erectus) evolved the ability to produce an extraordinary object that archeologists call a handaxe. A handax...If, as the author assumes, handaxes were genetically-informed because they did not change for hundreds of thousands of years, then why do we not still have the instinct for hand axes?
23 JUN 2012 by ideonexus
Evolutionary Origins are Not so Fanciful
If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell may, in the course of untold millions of years, give origin to the human race.Folksonomies: evolution
Folksonomies: evolution
Each human goes from a single cell to fully-formed human in just a few years, so why not the same over billions of years?