Cornell Researchers Precisely Date Wood From Ancient Tomb In Turkey
...ents of the past and present. "Often the different dating systems which have been used in interpreting the history and archaeology of the Near East have had profound effects on how we understand cultural interactions," Newton said, "such as the rise and fall of the Minoan, Mycenaean and Greek civilizations;...Bark Beetle Infestation Spurs Multifaceted Study
...that grow one per year or one per season,tree ring dating -- dendrochronology -- is often used to determine the ageof trees and their dates of cutting. Climate information, the history ofdroughts and wet periods, can also sometimes be garnered from the rings.Archaeologists use tree rings to identify the age...Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
... Searching the scant available publications,most dating from several decades earlier, she learned that the only truemahogany species (Swietenia macrophylla) now providing commercial timbergrows only in tropical forests of South and Central America. Another American species native to a few Caribbean islan...More To Drought Than Meets The Eye
...e trees grow individual rings each year, tree ring dating --dendrochronology -- is often used to determine the age of trees by looking atthe growth pattern and matching all trees on a site using key signature rings,such as the small rings representative of a drought. In this way, the ringscorresponding to t...Common Childhood Virus Poses Threat To Adults, Research Shows
...cal records as well asthe results of other studies dating back to the 1960s. Murry and Dowellthen pieced together a set of symptoms that doctors can look for when examininga patient for RSV. Murry said the typical patient had experienced severe cold symptoms fora week or two, then, despite taking antibioti...Chesapeake Bay Sediment : Home To Pfiesteria-Like Microbes
...(CEES) indicates that some of the sediment samples dating back hundreds or thousands of yearscontain Pfiesteria-like organisms and other microbes. Pfiesteria are microscopic, single-celled plants known as dinoflagellates thathave complicated life cycles involving many different physical forms. Scientists ar...Purdue Study Finds Prehistoric Couch Potato
...pus, found that while all early dinosaurs -- those dating back about 220 million years -- breathed inefficiently, dinosaurs that lived only 70 million to 65 million years ago had a much-improved system, resembling that of modern mammals. However, the rate of improvement in respiratory capabilities differed ...10,000-Year-Old Clues Suggest Future Forest Changes
...und a large amount of charcoal in the lake bottoms dating to that period (7,000-9,000 years ago) indicating forest fires," Mathewes explains. He attributes the fires to a drier, warmer climate with prolonged droughts and possibly to an increase in the number of storms. A chance discovery on Castle Peak help...Eating Lake Ontario Fish Linked To Shorter Menstrual Cycles; Consumption May Delay Pregnancy
...ent reported eating fish for at least seven years, dating back to a time when lake contamination was higher than in recent years. Researchers found a small conception delay for women who ate fish, but the effect was not statistically significant. The study on the association of fish consumption and...Strange South American Fossil Mammals Found In Madagascar And India
...ny Brook. The 65-70 million year old mammals, dating from the Late Cretaceous period, were unrelated to any groups living today and are known as gondwanatheres. The discovery of their highly distinctive teeth in such disparate places as South America, Madagascar and India has fundamental implications ...Widespread Genus Of Monkeys Gives Up Genealogical Secrets To Columbia Researchers
...the genus isone of the oldest among Asian monkeys, dating to at least 7 million years ago,and one of the most successful, radiating from its home base in Africa to Europeand across southern Asia, from eastern Afghanistan through Pakistan, India,southern China, Burma, Thailand, Japan, Taiwan and the Indonesi......a manuscript in the 11th century AD but with atext dating to about 150 BC at the Archaeological Institute of America annual conference during a 1:30 p.m. session on Sunday,Dec. 28, at the Chicago Sheraton Hotel and Towers. The medical writer's name, listed as "Damnastes" on themanuscript itself, is real...Fauci: New Findings Help Explain "Rebound" Of HIV In Patients Who Discontinue Triple-Drug Therapy
... Background In studies dating back to the mid-1980s, Dr. Fauci and his team have shown that certain cytokines normally secreted by immune cells, particularly in the lymph nodes, can boost the replication of HIV. Blocking these so called "inductive" cytokin...New Dating Technique May Revise Geologic Time Scale
... surrounding igneous rocks or usingpotassium-argon dating to obtain average ages on large glaucony samples w...re appropriate. "We think we have a way of dating the times at which glaucony formationis going on, which allows us to follow the ups and downs of sea......craters more precisely–usinglaser argon/argon dating of the glass formed by localized heating of the rock.They asked Rowley to help figure out how the craters were aligned when theimpacts occurred–because of plate tectonics, the continents have movedextensively in the last 214 million years. Rowle...Among Wrens, Moms Teach Daughters To Call, Dads Teach Sons, Study Reveals
...the birds were related because ofextensive banding dating back more than 24 years and DNA "fingerprinting," whichshowed genealogy. The stripe-backed wrens' communication system is unlike that of anyother known birds, he said. Surprisingly, it is remarkably similar to that ofkiller whales, which also...Gene Study Shows Mammals Lived Before Extinction Of The Dinosaurs
...elded origin dates similar tothose based on fossil dating for many species, but for others the genetic clueslead back to a much earlier time. For example, Hedges says "the fossil recordfor rodents says that mouse and rat split only 10 million years ago, but we have343 genes in this study telling us that mo...New Fossil Discoveries Clinch Ancient Age Of Human Ancestor
...yer associated with these fossils because the best dating technique, the 40 Argon/39 Argon method, needs crystals and this particular layer is mostly powdery ash," Walker explains. "Since then--after much sifting through the ashes--we have managed to get enough good crystals to determine quite firmly ...Remarkable Skull Of Predatory Dinosaur Unearthed On Madagascar
...ledMajungatholus atopus (a theropod dinosaur), and dating to the Late Cretaceousperiod, were unearthed on an international expedition conducted by Science paperco-author David Krause of the State University of New York at Stony Brook. "The specimens of Majungatholus represent another in a series ofr...