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Evolution of Human ‘Super-Brain’ Tied To Development of Bipedalism, Tool-Making

By Guest PostApril 22, 2011Scienceafrica, ants, archaeological evidence, archaeologist, Arctic, bees, bipedalism, don river, Europe, evolution of human mind, fossil, france, Germany, honeybees, human ancestors, human brain, human mind, john hoffecker, kostenk, lucy, modern mind, moscow, russia, social insects, stone tools, super brain, university of colorado boulder, waggle dance

Scientists seeking to understand the origin of the human mind may want to look to honeybees — not ancestral apes — for at least some of the answers, according to a University of Colorado Boulder archaeologist.

CU-Boulder Research Associate John Hoffecker said there is abundant fossil and archaeological evidence for the evolution of the human mind, including its unique power to create a potentially infinite variety of thoughts expressed in the form of sentences, art and technologies. He attributes the evolving power of the mind to the formation of what he calls the “super-brain,” or collective mind, an event that took place in Africa no later than 75,000 years ago. (more…)

Imagine: Material That If Scratched, You Can Quickly and Easily Fix Yourself, With Light Not Heat

By Guest PostApril 21, 2011Scienceabrasive environments, andrew lovinger, automobiles, christoph weder, mechanical properties, metallo supramolecular polymers, microstructure, molecular glue, napoleon complex, polymer, scientific concepts, self corrective healing process, stuart rowan, supramolecular, switzerland, united states, weak molecular interactions

*Discovery of self-corrective healing process for polymer detailed this week in the journal Nature*

Imagine you’re driving your own new car–or a rental car–and you need to park in a commercial garage. Maybe you’re going to work, visiting a mall or attending an event at a sports stadium, and you’re in a rush. Limited and small available spots and concrete pillars make parking a challenge. And it happens that day: you slightly misjudge a corner and you can hear the squeal as you scratch the side of your car–small scratches, but large anticipated repair costs.

Now imagine that that you can repair these unsightly scratches yourself–quickly, easily and inexpensively–or that you can go through a car wash that can detect these and other more minor scratches and fix them as the car goes through the washing garage. Fantasy. Not exactly. Not anymore. Not according to a new discovery detailed in the April 21 issue of the journal Nature, and depicted in a short video interview and simulation. (more…)

Berkeley Lab Scientists Find That Normal Breast Cells Help Kill Cancer Cells

By Guest PostApril 20, 20111 commentHealth, Scienceberkeley lab, breast cancer cells, cytostatic, cytotoxic, dna mutations, extracellular matrix culture, healthy cells, human body, il25, immune system, inflammation, interleukin 25, malignant phenotype, mammary epithelial cells, microenvironmental factors, mina bissell, natural defense mechanism against cancer, pathogens, protein, saori furuta, treatment of breast cancer, tumor cells, tumor surveillance system

It is well known that the human body has a highly developed immune system to detect and destroy invading pathogens and tumor cells. Now, researchers at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) have shown that the body has a second line of defense against cancer – healthy cells. A new study shows that normal mammary epithelial cells, as they are developing, secrete interleukin 25, a protein known for its role in the immune system’s response to inflammation, for the express purpose of killing nearby breast cancer cells.

“We found that normal breast cells provide an innate defense mechanism against cancer by producing interleukin 25 (IL25) to actively and specifically kill breast cancer cells,” says breast cancer authority Mina Bissell, of Berkeley Lab’s Life Sciences Division, who led this research. “This suggests that IL25 receptor signaling may provide a new therapeutic target for the treatment of breast cancer.” (more…)

Are Your Values Right or Left? The Answer Is More Literal Than You Think

By Guest PostApril 19, 2011Sciencebrain-injured patients, daniel casasanto, dexterity test, linguisti tropes, mental metaphors, optimistic, putative, zebras

Up equals good, happy, optimistic; down the opposite. Right is honest and trustworthy. Left, not so much. That’s what language and culture tell us. “We use mental metaphors to structure our thinking about abstract things,” says psychologist Daniel Casasanto, “One of those metaphors is space.”

But we don’t all think right is right, Casasanto has found. Rather, “people associate goodness with the side they can act more fluently on.” Right-handed people prefer the product, job applicant, or extraterrestrial positioned to their right. Lefties march to a left-handed drummer. And those linguistic tropes? They probably “enshrine the preferences of the right-handed majority.” (more…)

Ceramic Coatings May Protect Jet Engines From Volcanic Ash

By Guest PostApril 17, 2011Scienceaircraft engines, ceramic coatings, jet engines, sand resistant coatings, silicate ash, thermal barrier coating, volcanic ash

COLUMBUS, Ohio – Last year’s $2 billion shutdown of European airspace following a volcanic eruption in Iceland alerted everyone to the danger that ash clouds can pose to aircraft engines. (more…)

WISE Delivers Millions of Galaxies, Stars, Asteroids

By Guest PostApril 17, 2011Scienceastronomers, blue star, celestial objects, colorful images of the cosmos, earth, edward wright, entire sky, fengchuan liu, galaxies, infrared wavelengths, nasa. wide field infrared survey explorer, polar orbit, roc cutri, solar system, star forming complexes, universe, wise, zeta ophiuchi

Astronomers across the globe can now sift through hundreds of millions of galaxies, stars and asteroids collected in the first bundle of data from NASA’s Wide-field Infrared Survey Explorer (WISE) mission.

“Starting today thousands of new eyes will be looking at WISE data, and I expect many surprises,” said Edward (Ned) Wright of UCLA, the mission’s principal investigator. (more…)

Search for Dark Matter Narrowed by New Data From XENON100

By Guest PostApril 16, 2011Sciencebackground radiation, bombarding earth, cosmological observations, dark energy, dark matter, Germany, gran sasso national laboratory, mysterious dark matter, Netherlands, particle physics, particles, universe, weakly interacting massive particles, wimps, xenon collaboration, xenon100 experiment

*Collaboration reveals results from 100-day experiment*

Today, scientists from the XENON collaboration announced the result from their search for the elusive component of our universe known as dark matter. After analyzing one hundred days of data taken with the XENON100 experiment, they see no evidence for the existence of Weakly Interacting Massive Particles (WIMPs), the leading candidates for the mysterious dark matter. The XENON100 experiment is operated deep underground at the Gran Sasso National Laboratory of the Italian National Institute for Physics (INFN). (more…)

UF Researchers Help Pinpoint Key Events in Ancient Plant Evolution

By Guest PostApril 14, 2011Scienceancient genome duplication, angiosperms, big bangs, cucumber plants, DNA, doug soltis, evolution of seed and flowering plants, flowering plants, genes, genomes, grape, jonathan wendel, modern genome complexity, organisms humans, pam soltis, papaya, poplar, rice, signal, university of florida, water lily

GAINESVILLE, Fla. — Researchers from the University of Florida and six other institutions have unlocked some of the key foundations for the evolution of seed and flowering plants.

The study, to be published online Sunday in Nature, is the first to identify the occurrence of ancient genome duplication events and show the genomes of seed and flowering plants duplicated before each group of plants diversified. It introduces new factors for further molecular research on the organisms humans depend on for food, clothing and shelter. (more…)

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