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The Ten Thousand year Explosion, Review

For anyone insterested in anthropology and evolution one of the most fascinating new finds has been the evidence of an acceleration of adaptive evolution in human beings over the last 40,000 and especially the last 10,000 years. This flew in the face of the idea that humans had essentially stopped evolving biologically when cultural evolution became a major force which had been a position espoused some of the most when well know biologists and anthropologists such as stephen Jay gould and Ashley Montague. The new evidence would indicate that rather then stopping biological evolution increased cultural evolution accelerated biological evolution by creating even more diverse enviroments and new and different stressors. In retrospect this is obvious we have known for ages that humans evolved adaptions to diseases we recieved from animals after domestication like small pox, that we evolved lactase persistince in population specializing in pastoralism and increased amalyse production in populations specializing in farming. What nobody had pointed out was how this obvious tests case were likely just the most obvious of a vanguard of changes.

The ten thousand year explosion is an exploration of the evidence for this acceleration, a argument for why it happened and a picture of how the authors think it affected us.

It is sweepingly large book in small package is easy to read engaging and mostly persuasive, however the brevity of their approach often leaves one feeling like though their argumentation is convincing it is not as fully developed as possible considering some of the very conterversial claims made in the books this probably not the best approach. At times I felt the authors made statements that were highly conterversial as if they were accepted fact and only much later got around to providing evidence for their position.

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Latest news on female primates, of the human and non-human variety

The latest and the greatest about women primates!

1. hot climates tend to produce more girls

2. Márta Daróczi-Szabó, an archaeozoologist at Eötvös Loránd University in Budapest, recently lead an archaeological dig that found up to 10 dogs sacrificed and buried near house foundations, apparently as a way to ward off evil. Dogs protecting the home, in a somewhat odd way.

3. And finally, the slightly annoying practice of my mother-in-law constantly stealing food from her son’s plate actually had an evolutionary reasoning behind it: by stealing food, female orangutans test the patience and hospitality of males to see if they’d be good mates. So all those years of stealing actually trained my husband to be a good mate. Thanks Judy!

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It’s in his kiss!

Betty Everett was right!

Recent studies have found that saliva contains chemical and hints of evolutionary fitness, so when you’re swapping spit with your significant other, you’re literally giving them cues and chemicals that describe to them if you’d be a good fit.

It also promotes pair bonding, decreases cortisol, and burns calories. What’s not to like?

Brought to us by Helen Fisher, Rutgers University, at the annual conference of the American Association for the Advancement of Science (AAAS) in Chicago. She is the official “love” anthropologist who studies human bonding, and who they pull out every Valentine’s Day to explain why we love each other. But overall pretty sweet gig.

children

Why kids LOVE sugar

I just thought this was interesting; kids crave sugar the most, or love the sweetest juices, when they’re growing the fastest. Cravings for super sweet things tends to die down around 16, around the age that most of us significantly slow or even stop growing.

Very cool study that I would have loved to have been in as a kid. Actually, according to my mother I didn’t like very many sweets, AND I am only 5’2″. Coincidence? Hmm…

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Dog societies closest to humans’

According to this researcher in Hungary, dog social behavior most mirrors humans, more than chimps, gorillas, meerkats, whatever.

He believes that we should study dog culture to better understand humans. I am all for it, and completely agree with his findings. However, I think he and other dog researchers need to make it super-clear why dogs are so similar…because we essentially bred them to be.

First, yes, dogs adapted to us (nonconclusively, but their bones have been found near human archaeological sites as old as 40,000 years or more). But now, for the domestic dog their social structure is dependent on us, in a way.

I think studing the wild relatives – coyotes, wolves, wild dogs – provides a more independent understanding of social predator lifestyles outside of humans, if that’s what you’re going for. If you’re looking for “a mirror into humanity,” but in a somewhat look-what-we-can-do sort of way, then sure.

Jozsel Topal, lead author of the study, says that by studying humans, dogs, and wolves together we can triangulate findings about social predator behaviors. The article also quotes Marc Hauser as saying that dogs’ evolution being manipulated by humans over the years is a good thing to study and provides insight into how we evolved. But we have to remember that dogs became dogs because their ancestors ALREADY were social creatures who had society structures.

To me it feels like unless you’re studying packs of feral dogs, it’s like studying a goldfish in a tank and trying to figure out how a koi fish acts in a large pond. You have to acknowledge the co-dependence.

I think studying dog behavior is important. In fact I would LOVE to study dog behavior for a living. But my hang up is saying that dog societies are the most like humans’ societies, without stipulating that we MADE them that way, is careless at best.

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Chimps dig (for) honey

Awesome footage of chimpanzees using massive sticks and logs to knock down bee hives to get to the honey. I love the one guy who hammers the bee hive holding onto the branch with both his hand and foot.

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A day in the life of a Hunter forager

Anthropology buffs should check out this post on our other blog about activity patterns of hunter foragers:
http://naturalathletics.blogspot.com/2009/03/day-in-life-of-hunter-forager.html

brain · neuroscience

Evolution of the mind

This is an older (from February) interview from Discover Magazine with Nobel laureate and neuro­scientist Gerald Edelman. Edelman is interested in studying what makes each human mind so unique, and thinks he may have found the answer: natural selection of the brain!

“Neurons proliferate and form connections in infancy; then experience weeds out the useless from the useful, molding the adult brain in sync with its environment.” His latest book, which I have no read, is called Second Nature: Brain Science and Human Knowledge.

I think this is an interesting theory, but need to read more about it before I feel comfortable forming any opinions on it. After reading the interview, let me know what you think.

children · technology

Robot love

A baby monkey in the U.K. gets a stuffed surrogate mom with a mechanical heart while her mom recovers from a c-section, so the little DeBrazza baby can lie against the toy and be comforted by her “mom’s” heartbeat. Awwww…..

Teams in Italy and the U.K. are currently developing a robot kid. This robot has been programmed to learn how to crawl, walk, an move, using the leading theories today of child development. The best part, the schematics on how to make the kid are open access, meaning ANYONE who has serious robotics training could potentially make and teach this robot kid. They hope this will speed the development of the robot, including developing nerves and sensing skin for the kiddo. My favorite part in the film clip (see link), is when the robot gets “falls asleep.”

technology

Better tools

A troop of chimps has learned how to build a better termite trap.

Going back in time, 13,000 year old, blood-stained tools were found in a guy’s back yard in Colorado.