Tag: "stone" at biology news

CT scan reveals ancient long-necked gliding reptile

...en unsuccessful." "The fossils sit on sheets of stone less than a quarter inch thick," says Tim M Ryan, research associate in anthropology and member of Penn State’s Center for Quantitative Imaging. "The color of the bones is the same as the color of the surrounding matrix which makes preparation diffi...

Newborn brains grow vision and movement regions first

...present at birth. That gender difference is set in stone very, very early in brain development," Gilmore said. However, the scans revealed that brain asymmetry -- or which side of the brain is larger -- was opposite in newborns and adults. In adults, the right side of the brain is usually slightly larger...

The chimpanzee stone age

...impanzees from West Africa were cracking nuts with stone tools before the advent of agriculture, thousands ...eveloped this behaviour on their own, or even that stone tool use was a trait inherited from our common ancestor. Julio Mercader, Christophe Boesch and colle...

Hofmeyr skull supports the 'Out of Africa' theory

...own as the Later Stone Age, with its sophisticated stone and bone tools and artwork appears in sub-Saharan Africa, and anatomically modern people appear for the first time in Europe and western Asia with the equally complex Upper Paleolithic archeological tradition. In order to establish the affinities o...

Trojan horse strategy defeats drug-resistant bacteria

...ach is promising, and we can't afford to leave any stone unturned."...

New evidence of 'human' culture among primates

...a rare and highly-prized example of primates using stone technology, adding to the archaeological record of...re perishable. The simple example of percussive stone technology uncovered by Dr Moura adds to other types of stone technology already known. For example,...

Microbes compete with animals for food by making it stink

...arshes near Skidaway Island and caught hundreds of stone crabs, as well as other crab species, fishes and s...minate food avoidance because of texture, they fed stone crabs, lesser blue crabs and striped hermit crabs noodle-like test foods made from pureed forms of e...

A buffet for early human relatives

...l. That was shortly before the first appearance of stone tools and of Paranthropus and Homo, the genus to which modern humans (Homo sapiens) belong. The researchers noted that Paranthropus often has been portrayed as a specialist that lacked a varied diet, and that has been used to explain why Paranthr...

Ancient ape ruled out of man's ancestral line

...a direct line to humans. The first recognisable stone tools appeared in Africa around 2.6 million years ago, but they were not made by Australopiths. Rather it is thought the first tool maker was Homo habilis, whose evolution is believed to have led directly to man. Rather than being older than Homo hab...

Rising ocean temperatures, pollution have oysters in hot water

...value, such as blue crabs, sheepshead, croaker and stone crab," Sokolova said. "Some of these species, such as blue crabs, use oyster beds and reefs as nursery areas and as feeding grounds." The oyster beds are also important to a variety of marine life that serves as food for larger fish. It was within th...

Ground spider diversity studied in research project

.... Henderson hopes her studies will be a stepping stone to a new career when she graduates in May. "There are few arachnologists," she said. "But that (knowledge) comes in handy when someone gets bitten or you have major spider problems." The City of College Station has a long-term commitment to invento...

Use of stone hammers sheds light on geographic patterns of chimpanzee tool use

... that chimpanzees in the Ebo forest, Cameroon, use stone hammers to crack open hard-shelled nuts to access the nutrient-rich seeds. The findings are significant because this nut-cracking behavior was previously known only in a distant chimpanzee population in extreme western Africa and was thought to be re...

U of M study examines kidney stone prevention in astronauts

...n sodium, which also increases the risk for kidney stone development. "In combination with hydration therapy, exercise in a machine that simulates gravity could reduce the astronaut's risk of developing kidney stones, a condition that could be particularly painful and lead to an aborted mission," Monga sa...

ASU researchers find link between social behavior, maternal traits in bees

...ior--scientists can use the findings as a stepping stone when looking at the social evolution of other animals. "Our findings identify a bridgehead between solitary and social behavior," Amdam said. "If we can understand the emergence social behavior in one system, we can use this insight to create a more...

New analysis shows three human migrations out of Africa

...o as well as the adaptation and expansion of a new stone tool culture first found in Africa and later at 700,000 years expanded throughout Eurasia. "By the time you're done with this phase you can be 99 percent confident that there was recurrent genetic interchange between African and Eurasian populations...

Expanding forests darken the outlook for butterflies, study shows

...that they can easily find in meadows: sunlight and stone crop. Butterflies need sunlight to elevate their ...ugh with quickness and ease. Parnasissus also need stone crop, a plant that grows in meadows and is the only suitable host for alpine butterfly larvae. Ther...

NASA links nanobacteria to kidney stones and other diseases

...(NASA) scientists as a potential culprit in kidney stone formation among astronauts. With the potential for...n human bodies can help reduce the risk for kidney stone formation in astronauts and would also be of benefit to the nearly one million Americans who are tre...

Scientists find fossil proof of Egypt's ancient climate

... in the form of Middle Stone Age artifacts such as stone scrapers and blades. "The artifacts provide a record that people were coming to the lake," said Smith. "Genetic evidence suggests that 100,000 to 400,000 years ago was a critical time in the evolution and dispersal of African hominins. Our climate d...

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