Tag: "prehistoric" at biology news

Anthropologists find evidence of early humans in southern China cave

... is the poorest quality material. As a result, the prehistoric peoples probably chose other materials for tools--one of the reasons the bamboo tool hypothesis was proposed. "We believe we're the first to show that large animal teeth were used as the raw material for tool production," said Schepartz, who noted t...

New fossil study rejects 'Eve theory'

... must have become extinct, possibly wiped out in a prehistoric genetic holocaust. Other scientists, including Wolpoff and colleagues Hawks, Frayer, and Hunley, maintain that there is little evidence that a small group originating in a single geographic region replaced the entire population of early human...

Ancient origins found in arabidopsis genome

... says Vision. He draws an analogy between finding prehistoric genetic relationships and the development of language. Many words in Romance languages like Spanish, Italian, French and Portuguese are derived from Latin. "We can see the roots of the modern words as being derived from Latin," he says. "In our ca...

Microbes make mine-waste drinkable, Science researchers report

...tivity of these bacteria may have played a role in prehistoric geochemical cycles when the Earth had not yet accumulated significantly great amounts of atmospheric oxygen. Presence of the bacteria may be indicated by the deposits of zinc sulfide ores corresponding to this geologic period. The team of scientis...

Seven decades of management virtually wipes out life from the tidal flats of the Colorado River Delta

...rom four universities, can be used to estimate the prehistoric productivity of coastal ecosystems in other parts of the world. Such estimates will be especially valuable in areas where no biological surveys were made before humans modified the habitat. "This effort was highly interdisciplinary," says Michal...

2000 FALL MEETING: updated press conferences, press registration, and other information

...V72A) Saturday, December 16 9:00 AM Effects of prehistoric natural disasters on human culture Important cultural transitions in human prehistory may have been triggered by droughts, floods, volcanic eruptions, and other natural events. An interdisciplinary group of anthropologists, marine scientists, geolog...

December Geology and GSA Today highlights

...ioneered in this study can be used to estimate the prehistoric productivity of coastal ecosystems in other parts of the world. Such estimates will be especially valuable in areas where no biological surveys were made before humans modified the habitat. GSA TODAY Beneath Yellowstone: Evaluating plume and n...

Fossil teeth of extinct North American rhinos reveal an aquatic lifestyle similar to modern hippos

Among the large mammals that roamed prehistoric North America was a type of rhinoceros that seems to have lived in the water, much like a modern hippopotamus. The extinct rhinoceros, known as Teleoceras, ranged from Florida to the West Coast from about 17 million years ago until about 4.5 million ...

Scientists discover enzymes capable of duplicating damaged genetic material (DNA) and creating new mutations

...ime scenes, or ancient DNA found in the remains of prehistoric plants and animals. These two forms of DNA are often damaged (for instance, by cleaning detergents aimed at destroying the evidence left at a crime scene, or simply the ravages of time in the case of ancient DNA). Previous reconstruction attempts usi...

UMR research could pave way for discovery of life on Mars

... so. "In the book and the movie, scientists find a prehistoric mosquito trapped in amber. We're doing something similar with the bacteria that is trapped in salt crystals. And we hope to do this with Mars samples as well." Although Mormile concedes it's possible that a modern bacterium was somehow introduced t...

Media Advisory 2: Fall Meeting: Abstracts, press conferences, press registration

...icy activities Effects of natural hazards in prehistoric times Fire in boreal forests The science of carbon sequestration Microbial survival and interaction with minerals The impact of volcanic activity on Earth's atmosphere Preliminary results of the Hawaii drilling project Volcanology in 2010...

Geological Society of America: Annual Meeting 2000

...Oceanographic Institution, Sedimentary evidence of prehistoric hurricane strikes in southern New England. Lisa Greer, Univ. of Miami, A multi-proxy reconstruction of Holocene storm activity from tropical reef biota, Dominican Republic. Blair R. Tormey, Univ. of Wisconsin, Storminess of the last interglacial: G...

October Geology and GSA Today highlights

...situated close to the Nicaraguan capital and has a prehistoric record of major explosive eruptions, unusual for its basaltic magma composition. In addition, the authors measured sulfur, chlorine, and fluorine emissions from the volcano, providing a near-complete picture of the gas composition. The technique des...

Study provides direct evidence of cannibalism in the Southwest

...APEL HILL -- The first evidence of human tissue in prehistoric human waste dating back about 850 years shows that...ated that cannibalistic episodes took place in the prehistoric Southwest, but the evidence has been essentially circumstantial. "Now, we've identified biochemical ...

Grasslands, deserts, mountains and fire

...tors of ecological history, show conclusively that prehistoric fire patterns are very similar to modern observations of fires started by lightning. Allen also states that eyewitness accounts of Indian burning are rare and that the substantial archaeological and ethnographic data available in the Southwest reveal...

Intriguing archaeological sites, isolated lake targets of Kuril Expedition

...mple recent finds in the central Aleutians include prehistoric artifacts belonging to the Ainu culture of norther...sent from the islands and raise the possibility of prehistoric human impacts in this fragile ecological domain. Each of the chain's 56 islands has its own biologi...

Origins of first Americans

... Massachusetts---was descended from the Jomon, the prehistoric people of Japan. The Inuit appear to be a later branch from that same Jomon trunk. Tribal groups who lived down the eastern seaboard into Florida share this origin, according to Brace. Another group, originating in China and including the Athabasca...

Fossil plants' ties to ancient carbon redefined

...ink between fossil plants and carbon levels in the prehistoric atmosphere in doubt. "We have to keep in mind that these ancient organisms operated according to their own ecological agenda," says Hope Jahren , assistant professor of Earth and Planetary Sciences at Johns Hopkins, and an author of the paper. "How...

We are not alone - or are we?

...n the fossil record has provided key insights into prehistoric mass extinctions, frequently discuss the Earth's unusual character with students in their astronomy and geological sciences classes. The scientists don't argue that life is rare. In fact, recent evidence showing simple microbial life can survive extr...

Scientists document most recent date for Neandertals

...00 years ago. Neandertals are commonlyportrayed as prehistoric humans of limited capabilities who were rapidlyreplaced and driven to extinction by superior early modern humans, once thelatter appeared in Europe. Scientists surmised that modern humans from the NearEast moved first into central Europe and then int...

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(Date:8/20/2014)... Gray HealthDay Reporter WEDNESDAY, ... rare, colds, flu and other minor infections might trigger a ... children, a new study suggests. Just five out of ... States, said Dr. Heather Fullerton, lead author of the study ... of California, San Francisco Benioff Children,s Hospital. "It seems infections ...
(Date:8/20/2014)... Doheny HealthDay Reporter WEDNESDAY, ... mastectomy has long been an option, but a new study ... "The most common reasons women didn,t undergo reconstruction was ... more surgery or they were focused on their cancer treatment," ... at Memorial Sloan Kettering Cancer Center, in New York City. ...
(Date:8/20/2014)... common approach to treating kidney failure by removing waste ... for people who suddenly developed the condition, in an ... School of Medicine. , Their findings, published online in ... an aggressive method that is standardly used for people ... benefit to the patient. , "Our findings question the ...
(Date:8/20/2014)... cancer - using Botox. A study presented in the ... shows that cancer growth could be suppressed by eliminating ... cancer stem cells. The approach thus treated the cancer. ... and efficient. The researchers have thus far tested the ... humans. , The nervous system is crucial in regulating ...
(Date:8/20/2014)... August 20, 2014 A common approach ... the blood did not improve survival chances for people ... by experts at the University of Pittsburgh School ... today in the journal PLOS One , suggest ... for people with sudden kidney failure, may not provide ...
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