Physical language

From NYT: Psychologists have long studied the grunts and winks of nonverbal communication, the vocal tones and facial expressions that carry emotion. A warm tone of voice, a hostile stare — both have the same meaning in Terre Haute or Timbuktu, and are among dozens of signals that form a universal human vocabulary.

But in recent years some researchers have begun to focus on a different, often more subtle kind of wordless communication: physical contact. Momentary touches, they say — whether an exuberant high five, a warm hand on the shoulder, or a creepy touch to the arm — can communicate an even wider range of emotion than gestures or expressions, and sometimes do so more quickly and accurately than words.
“It is the first language we learn,” said Dacher Keltner, a professor of psychology at the University of California, Berkeley, and the author of “Born to Be Good: The Science of a Meaningful Life” (Norton, 2009), and remains, he said, “our richest means of emotional expression” throughout life.

Read full NYT articles

Math shows crime hot spots and how they move

Sorry I've been neglecting this site lately. Lots of birthdays, holidays, life, etc.

From Wired Magazine and Science News: Not all crime hot spots are created equal, a new mathematical model suggests. For some areas repeatedly hit hard with crime, police intervention can shut down lawlessness and keep it down. But for others, police involvement just shifts the trouble around.

“If you see a hot area of crime, you want to know: If you send the police in, will that displace the crime or get rid of the crime altogether?” said Andrea Bertozzi, a mathematician at UCLA who presented the new model Feb. 20 at the annual meeting of the American Association for the Advancement of Science. “We were able to predict the ability to suppress or otherwise displace hot spots.” The results will also appear Feb. 22 in the Proceedings of the National Academy of Sciences. The study “makes a major contribution to the theory of hot spots of crime,” comments John Eck, a criminologist at the University of Cincinnati.

Working with anthropologists, criminologists and the Los Angeles Police Department, Bertozzi built a mathematical representation of how areas with frequent, repeated crimes form within a city and change over time.
The team modeled a city as a two-dimensional grid populated with burglars and houses to rob. The researchers used previous studies to add a mathematical description of how attractive a region is to a burglar. Data has shown, for example, that the house next door to a house with a broken window is more likely to be robbed.
Bertozzi and colleagues ran simulations that led to the formation of crime hot spots and then simulated police intervention. Two sharply distinct outcomes emerged. Certain kinds of hot spots just moved around in response to police efforts to quash them. “It’s impossible,” Bertozzi said. “You hit one and it pops up somewhere else.”
But for others, suppressing the hot spot once erased it forever.
The difference comes from how the hot spot forms in the first place. The model shows that a high-risk zone forms around every break-in. If the boundaries of risk zones overlap, then a persistent hot spot forms. “The diffusion of risk basically binds together local crimes, which then will seed more crimes,” Bertozzi said.
But suppressible hot spots can form from one large crime spike, in which a single event draws in more criminals. A good example of this might be the formation of a drug market, said UCLA anthropologist Jeffrey Brantingham, a co-author of the paper.
“You wouldn’t suspect this was the case from just mapping the hot spots,” Brantingham said. “Empirically they look very much the same.” The math was able to show that there may be two different types of hot spots when the data alone could not, he said.

Read More

Abstract thoughts prompt literal physical response

From New York Times:

Researchers at the University of Aberdeen found that when people were asked to engage in a bit of mental time travel, and to recall past events or imagine future ones, participants’ bodies subliminally acted out the metaphors embedded in how we commonly conceptualized the flow of time.
As they thought about years gone by, participants leaned slightly backward, while in fantasizing about the future, they listed to the fore. The deviations were not exactly Tower of Pisa leanings, amounting to some two or three millimeters’ shift one way or the other. Nevertheless, the directionality was clear and consistent.
“When we talk about time, we often use spatial metaphors like ‘I’m looking forward to seeing you’ or ‘I’m reflecting back on the past,’ ” said Lynden K. Miles, who conducted the study with his colleagues Louise K. Nind and C. Neil Macrae. “It was pleasing to us that we could take an abstract concept such as time and show that it was manifested in body movements.”
The new study, published in January in the journal Psychological Science, is part of the immensely popular field called embodied cognition, the idea that the brain is not the only part of us with a mind of its own.
“How we process information is related not just to our brains but to our entire body,” said Nils B. Jostmann of the University of Amsterdam. “We use every system available to us to come to a conclusion and make sense of what’s going on.”
Research in embodied cognition has revealed that the body takes language to heart and can be awfully literal-minded.
Read full post

More ancient humans

A couple of the interesting ancient human articles from this month's Scientific American:

Turns out that if you're of European descent, your great-great-great-great granddad was most likely a farmer. Mark Jobling of the University of Leicester in the U.K. and his colleagues found not only that agriculture seems to have spread westward via a new group of Neolithic people from the Near East, but also that these new farmers were incredibly successful with the local ladies, leaving their genetic traces in their modern male descendents.

"We focused on the commonest Y-chromosome lineage in Europe," Jobling said in a prepared statement. The team analyzed a single haplotype, R1b1b2 (which is carried by about 110 million men in Europe today) from 2,574 European men whose families had been living in the same location for at least two generations. This common haplotype, however, is not randomly distributed across the continent. "It follows a gradient from south-east to north-west," he said. About 12 percent of men in eastern Turkey have it, whereas some 85 percent of men carry it in Ireland.


Going back even further, researchers looking at why humans became so hairless speculate it was an adaptation to changing environmental conditions that forced our ancestors to travel longer distances for food and water. Okay, more than speculate...the ability to time when we lost our hair is pretty cool.

Altruism in primates

Bonobos find it easier to share than chimps do, although young chimps do just as well as bonobos of all ages. It was speculated to be because bonobos don't have to worry about having more or less food like chimps do.

At the same time, chimps will adopt orphaned kiddos, according to a new study that found 18 cases of orphaned chimps being adopted in the wild.

Speaking of more and less, researchers based at the Institute of Neurobiology at the University of Tubingen in Germany set out to see whether rhesus monkeys could learn and flexibly apply the greater-than and less-than rule. They tested the monkeys with groups of both ordered and random dots, many of which were novel combinations to ensure that the subjects couldn't have simply memorized them. The monkeys were cued into applying either the greater-than or less-than rule by the amount of time that elapsed between being shown the first and second group of dots.

"The monkeys immediately generalized the greater than and less than rules to numerositiesthat had not been presented previously," the two researchers, Sylvia Bongard and Andreas Nieder, wrote. "This indicates that they understood this basic mathematical principle irrespective of the absolute numerical value of the sample displays." In other words: "They had learned an abstract mathematical principle."

Monkey calls translated

Reported by Nicolas Wade, NYT:

Walking through the Tai forest of Ivory Coast, Klaus Zuberbühler could hear the calls of the Diana monkeys, but the babble held no meaning for him.

Today, after nearly 20 years of studying animal communication, he can translate the forest’s sounds. This call means a Diana monkey has seen a leopard. That one means it has sighted another predator, the crowned eagle. “In our experience time and again, it’s a humbling experience to realize there is so much more information being passed in ways which hadn’t been noticed before,” said Dr. Zuberbühler, a psychologist at the University of St. Andrews in Scotland.

Do apes and monkeys have a secret language that has not yet been decrypted? And if so, will it resolve the mystery of how the human faculty for language evolved? Biologists have approached the issue in two ways, by trying to teach human language to chimpanzees and other species, and by listening to animals in the wild.
The first approach has been propelled by people’s intense desire — perhaps reinforced by childhood exposure to the loquacious animals in cartoons — to communicate with other species. Scientists have invested enormous effort in teaching chimpanzees language, whether in the form of speech or signs. A New York Times reporter who understands sign language, Boyce Rensberger, was able in 1974 to conduct what may be the first newspaper interview with another species when he conversed with Lucy, a signing chimp. She invited him up her tree, a proposal he declined, said Mr. Rensberger, who is now at M.I.T.

But with a few exceptions, teaching animals human language has proved to be a dead end. They should speak, perhaps, but they do not. They can communicate very expressively — think how definitely dogs can make their desires known — but they do not link symbolic sounds together in sentences or have anything close to language.

Better insights have come from listening to the sounds made by animals in the wild. Vervet monkeys were found in 1980 to have specific alarm calls for their most serious predators. If the calls were recorded and played back to them, the monkeys would respond appropriately. They jumped into bushes on hearing the leopard call, scanned the ground at the snake call, and looked up when played the eagle call.

More details!

I'm on a boat!

From Wired Science and Science News:

Human ancestors that left Africa hundreds of thousands of years ago to see the rest of the world were no landlubbers. Stone hand axes unearthed on the Mediterranean island of Crete indicate that an ancient Homo species — perhaps Homo erectus — had used rafts or other seagoing vessels to cross from northern Africa to Europe via at least some of the larger islands in between, says archaeologist Thomas Strasser of Providence College in Rhode Island.

Several hundred double-edged cutting implements discovered at nine sites in southwestern Crete date to at least 130,000 years ago and probably much earlier, Strasser reported January 7 at the annual meeting of the American Institute of Archaeology. Many of these finds closely resemble hand axes fashioned in Africa about 800,000 years ago by H. erectus, he says. It was around that time that H. erectus spread from Africa to parts of Asia and Europe. Until now, the oldest known human settlements on Crete dated to around 9,000 years ago. Traditional theories hold that early farming groups in southern Europe and the Middle East first navigated vessels to Crete and other Mediterranean islands at that time.
“We’re just going to have to accept that, as soon as hominids left Africa, they were long-distance seafarers and rapidly spread all over the place,” Strasser says. Other researchers have controversially suggested that H. erectus navigated rafts across short stretches of sea in Indonesia around 800,000 years ago and that Neandertals crossed the Strait of Gibraltar perhaps 60,000 years ago.

Questions remain about whether African hominids used Crete as a stepping stone to reach Europe or, in a Stone Age Gilligan’s Island scenario, accidentally ended up on Crete from time to time when close-to-shore rafts were blown out to sea, remarks archaeologist Robert Tykot of the University of South Florida in Tampa. Only in the past decade have researchers established that people reached Crete before 6,000 years ago, Tykot says.
Strasser’s team cannot yet say precisely when or for what reason hominids traveled to Crete. Large sets of hand axes found on the island suggest a fairly substantial population size, downplaying the possibility of a Gilligan Island’s scenario, in Strasser’s view.
In excavations conducted near Crete’s southwestern coast during 2008 and 2009, Strasser’s team unearthed hand axes at caves and rock shelters. Most of these sites were situated in an area called Preveli Gorge, where a river has gouged through many layers of rocky sediment.
At Preveli Gorge, Stone Age artifacts were excavated from four terraces along a rocky outcrop that overlooks the Mediterranean Sea. Tectonic activity has pushed older sediment above younger sediment on Crete, so 130,000-year-old artifacts emerged from the uppermost terrace. Other terraces received age estimates of 110,000 years, 80,000 years and 45,000 years.
These minimum age estimates relied on comparisons of artifact-bearing sediment to sediment from sea cores with known ages. Geologists are now assessing whether absolute dating techniques can be applied to Crete’s Stone Age sites, Strasser says.
Intriguingly, he notes, hand axes found on Crete were made from local quartz but display a style typical of ancient African artifacts.
“Hominids adapted to whatever material was available on the island for tool making,” Strasser proposes. “There could be tools made from different types of stone in other parts of Crete.”
Strasser has conducted excavations on Crete for the past 20 years. He had been searching for relatively small implements that would have been made from chunks of chert no more than 11,000 years ago. But a current team member, archaeologist Curtis Runnels of Boston University, pointed out that Stone Age folk would likely have favored quartz for their larger implements. “Once we started looking for quartz tools, everything changed,” Strasser says.

Read More

Neanderthal Shell Art

From Scientific American:

Newly discovered painted scallops and cockleshells in Spain are the first hard evidence that Neandertals made jewelry. These findings suggest humanity's closest extinct relatives might have been capable of symbolism, after all.

Body ornaments made of painted and pierced seashells dating back 70,000 to 120,000 years have been found in Africa and the Near East for years, and serve as evidence of symbolic thought among the earliest modern humans (Homo sapiens). The absence of similar finds in Europe at that time, when it was Neandertal territory, has supported the notion that they lacked symbolism, a potential sign of mental inferiority that might help explain why modern humans eventually replaced them.

Although hints of Neandertal art and jewelry have cropped up in recent years, such as pierced and grooved animal-tooth pendants or a decorated limestone slab on the grave of a child, these have often been shrugged off as artifacts mixed in from modern humans, imitation without understanding, or ambiguous in nature. Now archaeologist João Zilhão at the University of Bristol in England and his colleagues have found 50,000-year-old jewelry at two caves in southeastern Spain, art dating back 10,000 years before the fossil record reveals evidence of modern humans entering Europe.

Full article

2009: The Year of Cute

I could go into the social and biological implications of why we're turning away from sex to cute to sell things because it's the latest trendy thing to do, or because both sex and cute are biological impulses ingrained in us and we as humans react to sub-consciously. But, eh, I just like this post because Cute Is Back.! 

Kia Hamsters (Vid)

To check out all the cute vids, go to CuteOverload.

Jell-o enrichment for squirrel monkeys

Enjoy!

http://www.youtube.com/watch?v=yZpoyuVP98A

More mysterious hominids

Featured in Discover Magazine: The Boskops.
Skulls found of this group had a cranial capacity of 1,980 cc and a child-like face. The combination of a large cranium and immature face would look decidedly unusual to modern eyes, but not entirely unfamiliar. Such faces peer out from the covers of countless science fiction books and are often attached to “alien abductors” in movies.


The combination of a large cranium and immature face would look decidedly unusual to modern eyes, but not entirely unfamiliar. Such faces peer out from the covers of countless science fiction books and are often attached to “alien abductors” in movies. The naturalist Loren Eiseley made exactly this point in a lyrical and chilling passage from his popular book, The Immense Journey, describing a Boskop fossil:
“There’s just one thing we haven’t quite dared to mention. It’s this, and you won’t believe it. It’s all happened already. Back there in the past, ten thousand years ago. The man of the future, with the big brain, the small teeth. He lived in Africa. His brain was bigger than your brain. His face was straight and small, almost a child’s face.”

Boskops, then, were much talked and written about, by many of the most prominent figures in the fields of paleontology and anthropology.

Yet today, although Neanderthals and Homo erectus are widely known, Boskops are almost entirely forgotten. Some of our ancestors are clearly inferior to us, with smaller brains and apelike countenances. They’re easy to make fun of and easy to accept as our precursors. In contrast, the very fact of an ancient ancestor like Boskop, who appears un-apelike and in fact in most ways seems to have had characteristics superior to ours, was destined never to be popular.

Read the whole article
...

Wide spread tool use in primates

Despite the common perception, tool use is not just a sporadic behavior among animals; it's especially prevalent in primates.

For example, chimps use cleavers and anvils as tools to chop food. Chimps in the Nimba Mountains of Guinea, Africa, use both stone and wooden cleavers, as well as stone anvils, to process Treculia fruits.
The apes are not simply cracking into the Treculia to get to otherwise unobtainable food, say researchers.
Instead, they are actively chopping up the food into more manageable portions.
PhD student Kathelijne Koops and Professor William McGrew of the Leverhulme Centre for Human Evolutionary Studies, University of Cambridge, UK, studied a group of chimps living wild in the Nimba Mountains.
The apes' use of such tools can be surprisingly sophisticated. "For example, nut-cracking in the Bossou chimpanzee community in Guinea involves the use of a movable hammer and anvil, and sometimes the additional use of stabilising wedges to make the anvil more level and so more efficient," explains Ms Koops. "Termite fishing in some chimpanzee communities in the Republic of Congo involves the use of a tool set, i.e. different tool components used sequentially to achieve the same goal.
"These chimpanzees were found to deliberately modify termite fishing probes by creating a brush-end, before using them to fish for termites."

How do these animals keep their teeth healthy? Floss after a meal. At least one does. A macaque in Japan flosses its teeth with its hair, demonstrating that humans aren't the only animals that clean their teeth and invent tools to help with the task.

The flosser, a free-ranging, middle-aged, female Japanese macaque named Chonpe, may have come up with the tool and the idea, according to a new study that will appear in the January issue of Primates.

Lead author Jean-Baptiste Leca told Discovery News that dental flossing could have been a fortuitous yet "accidental byproduct of grooming."

Leca, a post-doctoral fellow at Kyoto University's Primate Research Institute, explained that "Japanese macaques sometimes bite into hair or pull it through their mouths to remove external parasites."

The hair might have become stuck in Chonpe's teeth, and as she drew the hairs out, "she may have noticed the presence of food remains attached to them."

"The immediate reward of licking the food remains off the hair may have encouraged her to repeat the behavior for the same effect in the future," he added.

Read more about meat hammering and flossing.

Developing minds

Lots of cool news came out recently about human development, from chimps to little humans:

Wild chimps have been shown to understand fire and how it moves, and don't freak out like other animals do. This is exciting because humans so far had been the only animals documented as keeping their cool around fire...for the most part.

Since we're in the jungle, it's once again been show that it's good for kids to go roll around in the dirt; for one thing it correlates with lower heart disease when they're older.

But back to brain wiring, kids who get intensive language training when they're young, like reading, actually have their brains re-wired, in a good way.

New education research is also showing that kids may understand Math at a much earlier age than previously though, and there are ways that they can learn the concepts just as early as we try to teach them language.

One of the skills kids can develop is compartmentalization, which it turns out cavemen could also do much earlier than previously thought; for example, they made different, compartmentalized work stations in their camps, rather than spread everything around and sleep right next to the meat-processing spot.

Speaking of stone-age types, a study has come out that counters the idea that hunter-gatherers didn't eat any grains at all.

All this data almost makes me want to grab some popcorn and pop it over a fire while playing math games. But not before I go work in my garden patch.

Even bacteria get lonely

Don't worry if you're feeling sort of lonely during this time of year; even bacteria feel alone sometimes, and there's trillions of them.

But, if you're really feeling blue, you can always move to Florida; states that get the most sun also tend to have the happiest residents.

Mayan king may have been a foreigner

From Science News:

A man’s skeleton found atop a stone slab at Copán, which was the capital of an ancient Maya state, contains clues to a colonial expansion that occurred more than 1,000 years before Spanish explorers reached the Americas.
The bones come from K’inich Yax K’uk’ Mo’, or KYKM for short, the researchers report in an upcoming Journal of Anthropological Archaeology. KYKM was the first of 16 kings who ruled Copán and surrounding highlands of what is today northern Honduras for about 400 years, from 426 to 820, say archaeologist T. Douglas Price of the University of Wisconsin–Madison and his colleagues. KYKM’s bone chemistry indicates that he grew up in the central Maya lowlands, which are several hundred kilometers northwest of Copán.
Along with inscriptions at Copán, the new evidence suggests that the site’s first king was born into a ruling family at Caracol, a powerful lowland kingdom in Belize. KYKM probably spent his young adult years as a member of the royal court at Tikal, a Maya kingdom in the central lowlands of Guatemala, before being sent to Copán to found a new dynasty at the settlement there, Price’s team proposes.
“These findings reinforce the notion that the Copán state was founded as part of a colonial expansion,” says archaeologist and study coauthor Robert Sharer of the University of Pennsylvania in Philadelphia. “They also demonstrate the widespread connections maintained by Maya kings.” This line of investigation aims to unravel how Classic era Maya city-states, which dominated parts of Mexico and Central America from about 200 to 900, originated and developed.
Hieroglyphics at Copán that were deciphered more than 20 years ago refer to KYKM as a foreigner who was inaugurated as king in 426 and arrived the next year. But it has been unclear whether the inscriptions referred to an actual historical event or were a form of royal propaganda. In 2007, archaeologist David Stuart of the University of Texas at Austin noticed that an inscription carved on a Copán stone monument referred to KYKM by a title indicating that he was originally a Caracol lord.
Archaeologists Arlen Chase and Diane Chase of the University of Central Florida in Orlando, who direct excavations at Caracol, consider it plausible that Copán’s first king was a Caracol lord but doubt that he arrived via Tikal. No signs of a political relationship between Caracol and Tikal appear at the time that KYKM took over at Copán, Arlen Chase notes.
Instead, KYKM probably came directly from Caracol, Arlen Chase says. By the year 150, Caracol hosted numerous royal activities and had extensive ties to settlements near Copán. “It would not be surprising for Copán to have coveted a Caracol individual to become their first ruler,” he says.

Photo Credit: Courtesy of the Early Copán Acropolis Program, U. of Penn. Museum and Instituto Hondureno de Antropologia e Historia

Read full story