Tag: "stone" at biology news
Singing in the brain
...s their song is crystallized or essentially set in stone
at least until the next mating season, when some changes can occur. The Utah biologists tested a theory dealing with the long-term "auditory memory" formed by young sparrows when they first hear other sparrows sing. Scientists want to know how tha...
Research led by UGA professor reports first routine tool use by wild capuchin monkeys
...n one, the monkey sat or stood bipedally, held the stone
in both hands and raised and lowered the stone
with arm and shoulder movements. A more strenuous method involves a monkey rising quickly to a nearl...
Anthropologists find 4.5 million-year-old hominid fossils in Ethiopia
...7), Semaw and colleagues reported the oldest known stone
tools used by ancestral humans. The Gona artifacts showed that as early as 2.5 million years ago, hominids were remarkably skilled toolmakers. Last month (December 2004), Semaw coauthored a paper in Geological Society of America Bulletin summarizing ...
Foot-eye coordination: Visual signals trigger rapid step adjustments without falls
By measuring how people respond when a stepping stone
suddenly shifts its position mid-step, researchers at the Institute of Neurology in London have shown that a powerful visual process controls the stepping foot a process similar to that used for manual reaching, in which the hand is rapidly and auto...
The oldest Homo sapiens
...ols. This stuff all comes in very late, except for stone
knife blades, which appeared between 50,000 and 20... found in 1967. They also found animal fossils and stone
tools, and studied local geology. The Nature study includes initial results from those expeditions. ...
'Hobbit' fossil likely represents new branch on human family tree
...entists found the Hobbit also contains remnants of stone
tools, fire, and a pygmy elephant, suggesting but not proving that Homo floresiensis may have had surprisingly advanced cognitive abilities given its chimpanzee-sized brain....
Hawaiian soils reveal clues to cultural history
...pled the open field as well as the soil underneath stone
walls remaining from that period. "The nutrient status in the field was much less than that under the walls," said Chadwick. "They were depleting the soil; it's the usual result of farming." The researchers believe that the losses continued over ti...
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. The...
Baylor Human Genome Sequence Center key player in mapping human genetic variation
...k." Gibbs also describes a natural next stepping stone
to understanding human gene variation and its relationship to disease in a commentary in the same issue of Nature. Together with the results from HapMap, the project, this effort puts the focus back on gene changes that directly affect humans. Data...
Researchers devise dinosaur classification method
... set of preserved dinosaur enamel: Smith's Rosetta stone
of theropod classification. "The problem is that theropod teeth are simple enough that everyone has ignored them for the last 200 years, " Smith said. He said that the simple shapes of theropod teeth have complicated previous rigorous attempts to ...
JCI table of contents: November 23 2005
...p?id=24482 Urinary protein TFF1 prevents kidney stone
formation Kidney stones affect 120% of the adult ...ery small number of inhibitors that prevent kidney stone
formation. In a study appearing online on November 23 in advance of print publication in the Decembe...
Bio-archaeologists pinpoint oldest northern European human activity
...scientific evidence which confirmed that primitive stone
tools discovered in East Anglia dated back around 700,000 years 200,000 years earlier than any other traces of human colonisation of northern latitudes. Dr Kirsty Penkman and Dr Matthew Collins were part of an international team, headed by the Ancie...
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,...
Early California: A killing field
...il, rocks, ash and charcoal, and artifacts such as stone
tools. The mound slowly grew until it was more than 30 feet tall, as long as three football fields, and as wide as the length of one football field. Then, in the 1800s, the top layers were flattened to make way for a dance pavilion, eliminating debri...
UMaine researcher puts new date on early agriculture
... starch grains extracted from sediment samples and stone
tools discovered at the site revealed two kinds of corn that had been ground into flour. No one has found a record of either from anywhere near this time for this part of Peru," said Sandweiss. "At this early time period, agricultural hadn't been dem...
First Amazon-Andean crop plant transfer and corn processing in Peru 3600-4000 years ago
... this puzzle. A multidisciplinary team excavated a stone
house at Waynuna, north of Arequipa on the western...ving to be an extremely important tool--applied to stone
tool surfaces and associated sediments, to new sites and to sites where warm, wet climates have dest...
Fine particles increase hospital admissions for heart failure and cardiovascular disease
...wer plants, factories, automobiles, tilled fields, stone
crushing and the burning of wood. Other particles may be formed in the air when sunlight and water vapor react with gases emitted from burning fuels. "By linking geographical locations and the health information of roughly all Medicare enrollees to t...
Magdalenian Girl is a woman and therefore has oldest recorded case of impacted wisdom teeth
... human cultures. Impaction was unknown during the stone
ages, scientists say, due to the coarse diet of th...ock shelter, famous for its magnificent decorative stone
frieze of sculpted horses, bison and deer that is still visited by tourists today. Several years ago...
Scientists scuttle claims that 'Hobbit' fossil from Flores, Indonesia, is a new hominid
...iny brain size, is the sophisticated nature of the stone
tools found in the same cave deposits where the fossils were discovered. Based on their size, style, and workmanship, these tools belong to types that are consistently associated with modern humans, or Homo sapiens, according to James Phillips, PhD, ...
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