After analyzing tools used by Neanderthals, British and American archaeologists say they were just as well-crafted as those used by our ancestors.

Flakes — wide-bodied stones used for cutting by Neanderthals and Homo sapiens — are just as useful, if not moreso, than narrow stone blades later favored by modern humans, who charged out of Africa 50,000 years ago and soon replaced their larger, hairier European forerunners.

“It’s not a better technology, it’s just a different technology,” said Metin Eren, a University of Exeter experimental archaeology student. [...]

The superiority of blades has long been seen as evidence of human superiority. But according to Eren’s team, blades had only one advantage: they can be easily attached to shafts.

Wired Science: Neanderthals Not Dumb, but Made Dull Gadgets

Scientists at the University of Liverpool have provided the first experimental evidence that shows that evolution is driven most powerfully by interactions between species, rather than adaptation to the environment.The team observed viruses as they evolved over hundreds of generations to infect bacteria. They found that when the bacteria could evolve defenses, the viruses evolved at a quicker rate and generated greater diversity, compared to situations where the bacteria were unable to adapt to the viral infection.

Read More – The “Red Queen Theory” -Scientists Find Driving Force Behind Evolution is Fight for Survival not Environment

(Thanks Paul)

Scientists say that a meteorite that crashed into Earth 40 years ago contains millions of different carbon-containing, or organic, molecules.

Although they are not a sign of life, such organic compounds are life’s building blocks, and are a sign of conditions in the early Solar System.

It is thought the Murchison meteorite could even be older than the Sun.

The results of the meteorite study are published in the Proceedings of the National Academy of Sciences.

Read More – BBC: Space rock contains organic molecular feast

See also: Professor claims life on earth came from space

(via Disinfo)

New evidence from astrobiology “overwhelmingly” supports the view that life was seeded from outside Earth, a scientist has claimed.

Prof Chandra Wickramasinghe of Cardiff University says the first microbes were deposited on Earth 3,800m years ago.

The astrobiologist has helped developed the panspermia theory which suggests an extra-terrestrial origin for life.

He argues for a cycle of life as microbes find their way into comets and “multiply and seed other planets”.
In the article, published in the International Journal of Astrobiology, Monday, he argues humans and indeed all life on Earth is of alien origin, brought onto the planet by comets hitting the planet.

BBC: Professor’s alien life ’seed’ theory claimed

(via HipGnosis)

If robots are allowed to evolve through natural selection, they will develop adaptive abilities to hunt prey, cooperate, and even help one another, according to Swiss researchers.

In a series of experiments described in the journal PLoS Biology, Dario Floreano of the Ecole Polytechnique Federale de Lausanne and Laurent Keller of the University of Lausanne reported that simple, small-wheeled Khepera and Alice robots can evolve behaviors such as collision-free movement and homing techniques in only several hundred “generations.”

The robots were controlled by a neural network that mutated randomly, with input information from the robots’ sensors. In an imitation of natural selection, the robots with the best maneuvering abilities were allowed to foster a new generation. Furthermore, selected robots were “paired” by having their neural net connections mixed and passed to a new generation.

CNET: Robots evolve to learn cooperation, hunting

The PLoS paper cited

(via Chris Arkenberg)

Discover is running a piece on the “forgotten race” of hominids the Boskops, the remains of which were discovered in South Africa in 1913:

The scientific community of South Africa was small, and before long the skull came to the attention of S. H. Haughton, one of the country’s few formally trained paleontologists. He reported his findings at a 1915 meeting of the Royal Society of South Africa. “The cranial capacity must have been very large,” he said, and “calculation by the method of Broca gives a minimum figure of 1,832 cc [cubic centimeters].” The Boskop skull, it would seem, housed a brain perhaps 25 percent or more larger than our own. [...]

Boskop’s greater brains and extended internal representations may have made it easier for them to accurately predict and interpret the world, to match their internal representations with real external events.

Perhaps, though, it also made the Boskops excessively internal and self-reflective. With their perhaps astonishing insights, they may have become a species of dreamers with an internal mental life literally beyond anything we can imagine.

The authors of the piece, Gary Lynch and Richard Granger (who co-authored the book Big Brain: The Origins and Future of Human Intelligence), wonder why the Boskop discovery has been almost entirely forgotten. University of Wisconsin paleoanthropologist has an answer for them:

This is obscure knowledge, but for a good reason — it’s obsolete and has been for fifty years! [...]

What happened is that a small set of large crania were taken from a much larger sample of varied crania, and given the name, “Boskopoid.” This selection was initially done almost without any regard for archaeological or cultural associations — any old, large skull was a “Boskop”. Later, when a more systematic inventory of archaeological associations was entered into evidence, it became clear that the “Boskop race” was entirely a figment of anthropologists’ imaginations. Instead, the MSA-to-LSA population of South Africa had a varied array of features, within the last 20,000 years trending toward those present in historic southern African peoples.

However:

To be sure, there has been a reduction in the average brain size in South Africa during the last 10,000 years, and there have been parallel reductions in Europe and China — pretty much everywhere we have decent samples of skeletons, it looks like brains have been shrinking. This is something I’ve done quite a bit of research on, and will continue to do so, because it’s interesting. But it is hardly a sign that ancient humans had mysterious mental powers — it is probably a matter of energetic efficiency (brains are expensive), developmental time (brains take a long time to mature) and diet (brains require high protein and fat consumption, less and less available to Holocene populations).

(Discover piece thanks to Paul, Hawks piece via Wikipedia)

Depression seems to pose an evolutionary paradox. Research in the US and other countries estimates that between 30 to 50 percent of people have met current psychiatric diagnostic criteria for major depressive disorder sometime in their lives. But the brain plays crucial roles in promoting survival and reproduction, so the pressures of evolution should have left our brains resistant to such high rates of malfunction. Mental disorders should generally be rare — why isn’t depression? [...]

In an article recently published in Psychological Review, we argue that depression is in fact an adaptation, a state of mind which brings real costs, but also brings real benefits. [...]

So what could be so useful about depression? Depressed people often think intensely about their problems. These thoughts are called ruminations; they are persistent and depressed people have difficulty thinking about anything else. Numerous studies have also shown that this thinking style is often highly analytical. They dwell on a complex problem, breaking it down into smaller components, which are considered one at a time.

This analytical style of thought, of course, can be very productive. Each component is not as difficult, so the problem becomes more tractable. Indeed, when you are faced with a difficult problem, such as a math problem, feeling depressed is often a useful response that may help you analyze and solve it. For instance, in some of our research, we have found evidence that people who get more depressed while they are working on complex problems in an intelligence test tend to score higher on the test. [...]

Depression is nature’s way of telling you that you’ve got complex social problems that the mind is intent on solving. Therapies should try to encourage depressive rumination rather than try to stop it, and they should focus on trying to help people solve the problems that trigger their bouts of depression. (There are several effective therapies that focus on just this.) It is also essential, in instances where there is resistance to discussing ruminations, that the therapist try to identify and dismantle those barriers.

For those who think modernity or civilization or technology is the problem:

Or, perhaps, depression might be like obesity — a problem that arises because modern conditions are so different from those in which we evolved. Homo sapiens did not evolve with cookies and soda at the fingertips. Yet this is not a satisfactory explanation either. The symptoms of depression have been found in every culture which has been carefully examined, including small-scale societies, such as the Ache of Paraguay and the !Kung of southern Africa — societies where people are thought to live in environments similar to those that prevailed in our evolutionary past.

Scientific American: Depression’s Evolutionary Roots

(via Theoretick)

“Wired magazine’s own ‘Senior Maverick’ talks with Ken Wilber about some of the ideas behind Kevin’s blog The Technium, which explores the various ways humanity defines and redefines itself through the interface of science, technology, culture, and consciousness. Kevin also shares some of his own thoughts about the role of spirituality in the 21st century, going into considerable depth around his own spiritual awakening several decades ago.”

(via Integral Life. h/t: Integral Praxis)

(The Technium Blog)

“Susan Blackmore is dedicated to understanding the scientific nature of consciousness. Her latest work centers on the existence of memes — little bits of knowledge, lore, habit that seem to spread themselves using human brains as mere carriers. She’s exploring the existence of a new class of meme, spread by human technology. It’s temporarily named the “teme.” She has written about memes, consciousness, and near-death experiences; has appeared on the British Big Brother to discuss the psychology of the participants; and writes for the Guardian UK.

[...] She makes a bold new argument: Humanity has spawned a new kind of meme, the teme, which spreads itself via technology — and invents ways to keep itself alive.”

(via TED)