Slashdot Mirror
Oldest Modern Humans Found
DrLudicrous writes "Anthropologists have reconstructed and dated three skulls from Ethiopia that they believe to be the oldest anatomically modern human skulls in existance. They date to 160,000 years ago, in agreement with genetic studies that pin the arrival of modern humans to at least 150,000 years ago. The skulls also demonstrate evidence of ritual burial." UC Berkeley has the original release as well.
It's time to revise the Bible again! Damn science, it makes my work so much harder.
Until Slashdot fixes the funny modifier, use insightful or interesting. The poster knows your intentions.
Not that hominids, though, arrived considerably earlier than this... what's the latest figure? somewhere in the 4 million range? Some of them wren't exactly dumb either; neanderthals, in fact, are supposed to have had more brain mass than humans did/do.
along with the skulls are some tools, and their way of burial is more than a simple "covering up with dirt and let's move on", which sort of indicates these ancestors are pretty smart and know what they were doing.
are we going to discover even earlier "modern" human remains in order to find out how we really came from??
You think it's confusing now? Wait until we get the postmodern humans. I shiver at the idea of self-referential genetics.
Hell, most of North America was populated with hunter/gatherers until Europeans came, and it's not like they weren't 'smart' enough or anything.
Thats not true. Specific cases in North America include the Mississippians, the Anasazi and the Calusa. These were sophisticated societies. They had relatively complex economies, large cities consisting of thousands of people, organized religion, art and centralized government. What is true, is that we know very little else about these societies, as the Europeans brought diseases which essentially wiped out these people.
In an article in Science this April ("Balancing Selection at the Prion Protein Gene Consistent with Prehistoric Kurulike Epidemics"), British scientists suggest that our ancestor's urge to eat brains may have lead to the modern absence of prion-based diseases (such as mad cow disease) in humans. This suggests that, to some extent, at some point evolution selected for brain eating in humans. The actual article requires a paid subscription, but here's a summary from a newspaper.
Saw a show on something related to this, "The Journey of Man", difference was using mutations on X chromosomes, which are passed unchanged from father to son, aside from random mutations. Anyways, a researcher (Spencer Wells) analysed the mutations in the X chromosomes from people all over the world, and came up with a map of sorts on the way people branched out.
. html
In summary, we're all descendant of a man who lived in Africa about 50,00 years ago (~2000 generations), with genes basically the same as bushmen.
The researcher laid it out quite clearly and convincingly, so it's worth a watch/read:
http://pup.princeton.edu/titles/7442
It really made me realize how related we all are, and silences the idiots who think blacks are closer to the apes, and whites are more advanced, etc.
Your hybrid is not saving the environment. Its purpose is to make you feel good about buying something.
Just a small nit-pick: I believe you mean Y chromosome, not X. All men get their X chromosome from their mother, and can only pass it on to their daughters. Y chromosome inheritance works as you described, though.
"Any fool can make a rule, and any fool will mind it."
--Henry David Thoreau
The artist's illustration in the Berkeley article (also used on the cover of the current edition of Nature) is misleading, in as much as it gives the figure kinky hair and thick lips, making for a more "African" look than is likely to have been the case.
The truth of the matter is that the earliest men almost certainly would have had straight hair, not curly or kinky but straight, and thin lips, just like most Europeans and Asians today. The wild-type for hair in primates is straight, and all of the great apes conform to that type. Similarly, no ape has thick lips, and our closest living relatives are pretty much lipless. Given these facts, why would any reasonable person expect the "first" men to look like modern day Africans?
Of course, it is logically impossible to rule out that our species evolved to gain the features of modern-day Africans only to lose them once again, but this flies in the face of both probability and Occam's razor - it is extremely unlikely that a feature, once lost, can then be regained down the line, simultaneously around all of the world outside Africa.
One mistake people tend to make is to assume that because our species originated in Africa, modern day Africans are somehow "closer" to what we must have originally been like, but this is nonsense. Africans are just as far removed from the original homo sapiens populations as any other population groups, so they've had just as much time to diverge from the original type. Africans, like any other populations, haven't stood still in evolutionary terms, contrary to the misleading notion that this article illustration propagates.