Duke Geologists Explore Alternative Way To Measure Ice Age Sea Bottom Temperatures
...wo glacial-to-interglacial cycles. The study found evidence that deep ocean water cooling has intensified in the past 3.2 million years, which the authors suggest is due to greater influence of bottom currents of colder waters flowing from the south polar region. The ostracod calcium-magnesium records also sh...... investigators had done. According to Ku, there is evidence that radioisotopes can migrate in and out of bone during the fossilization process, affecting the accuracy of dating. To double-check his data, Ku compared his mass spectrographic age determinations with results obtained from an alternate method - on...Race Plus Roaches: A Breathtaking Link
...severe allergic asthma. The researchers hunted for evidence of two different cockroach allergens, called Bla g1 and Bla g2, in the floors, bedding and stuffed furniture of homes. The allergen samples were collected using a handheld vacuum cleaner equipped with individual collection bags. Detectable levels of...Cornell Researchers Precisely Date Wood From Ancient Tomb In Turkey
...k trees, was dated to 1628 B.C. -- lending further evidence that this was the year of the Thera eruption. The ..."the new fixed dendrochronology provides important evidence towards the resolution of a century of debate over Assyrian and Mesopotamian chronology." To visuali...Humble Pocket Gophers Shed Light On The Genetic Fortitude Of Cheetahs
... close to that seen in inbred laboratory mice. Key evidence came from a surprising 1985 experiment in which unrelated captive cheetahs accepted skin grafts from each other, a sign that their immune systems were genetically almost identical. However, in recent years some ecologists have questioned the validity...Nitric Oxide May Hold Key To First Treatment For Deadly Form Of Malaria, Duke Scientists Report
...ry function," Stamler said. "There has beengrowing evidence that NO does its work in the body by signaling genes, butno one has found proof before this." Both oxygen and NO are vital to life processes, but too much of eithercan damage cells. To keep the amount of oxygen and NO in balance, cellshave ...Genetic Alterations Linked To Cancer In Some Blood Samples
...ancer. "We decided to test serum samples based on evidence from scientists two decades ago which pointed to increased levels of serum DNA in cancer patients," Sidransky said. "More recent studies suggest that cancer cells circulating in the blood may die and release DNA, which is carried through the bloodst...Nitric Oxide Found To Control Cells By Turning On Genes; Suggests New Role In Health And Disease
...ry function," Stamler said. "There has beengrowing evidence that NO does its work in the body by signaling genes, butno one has found proof before this." Both oxygen and NO are vital to life processes, but too much of eithercan damage cells. To keep the amount of oxygen and NO in balance, cellshave ...Newly Discovered Bacteria Produce Magnetic Material
...anometer is a billionth of a meter. "We also found evidence that the microbes can remediate groundwatercontaining chlorocarbon compounds, such as trichloroethylene andtetrachloroethylene, and heavy metals." The researchers found similar bacteria at the Naval Oil Shale Reserve at thePiceance Basin in Colorado....Harvard, Duke Researchers Discover 'Off-switch' Inside Human Cells
...versityComprehensive Cancer Center have discovered evidence for a new kind of "off-switch"inside human cells that can deactivate one of the cell's most prevalentbiochemical mechanisms for responding to chemical stimuli such as hormones. The scientists believe their basic discovery could eventually lead to ne...Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...rees normally grow in thick woods, she has foundno evidence that new mahogany seedlings will successfully grow in the shadeof other trees -- mahogany trees included. Snook is deeply concerned about the "mahogany deserts" she saidare being created by South and Central American logging practices. Remainingmaho...Component In Soy Products May Be Substitute For Estrogen Treatment
...sal women increasedbone-mineral density, providing evidence that a key compound in soy products-- isoflavones ...95, issueof the New England Journal of Medicine as evidence of soy protein's healthbenefits. The new study is the first to focus on postmenopausal women. Potte...NCAR Scientist Models Earth's Climate and Vegetation Patterns At Last Glacial Peak
...elp produce the correct vegetation, since there is evidence in the data for a slightly colder world than the model shows, especially in the tropics. According to Felzer, the model is accurate enough in showing past climates and vegetation that it can be a useful tool in simulating the future. The two NCAR mod...North America Hit Hard By Asteroid Strike In Yucatan 65 Million Years Ago
...d downrange. The researchers said that biological evidence appears to support theiroblique-impact hypothesis. North America, the first region to experience thefireball, had the most severe extinctions of plants. After the devastation, ferns dominated the flora of central North America.Ferns accounted for 70...An Equal Opportunity Extinction? Cincinnati Geologists Find Global Impact from Permian Die
...comparison. He expects thatwill provide additional evidence in favor of a long-term, globalcause for the massive die-off. "There's something worldwide going on," insisted Ebersole. "Noone's really been able to find a cause for the Late Permianextinction, but this restricts the cause to something with agloball...Antarctic Science Season Gears Up With Searches for Meteorites, Neutrinos, and New Life Forms
...NDA has spotted about 12 particles that seem to be evidence of incoming neutrinos. This season, hot-water drillers will bore out holes to install seven new strings of detectors 2,000 meters deep, to join the four strings already embedded in the ice sheet. Probing the Aurora When the sixth Automati...Animal Studies Indicate Aging Brain Responsive To Estrogen
...d rats. The scientists believe theirfinding offers evidence that minor memory losses sometimes associated withaging might be alleviated by replacing estrogens. The authors of the study, Phillippa Henderson, Christina Williams and GillianEinstein, prepared their findings for presentation Friday (Nov. 15) at t...Impact of Meteorites, Drop in Sea Level Caused Mass Extinctions 65 Million Years Ago
...f the journal Science reports the researchers' evidence supporting the controversial theory that the extin...niversity of Washington in Seattle -- also present evidence that other factors, including a drop in sea level prior to the assault by the massive asteroid or co......ment influences wordcomprehension, but there is no evidence that talking more than normal willincrease word comprehension," Professor Reznick cautioned. "A constantbarrage of words would likely only confuse a toddler." Hearing Impairment Can Hinder Word Comprehension A child who cannot respond to si...Siblicide In Nature: Study Of Galapagos Seabird Finds Death Can Ensure Species Survival
...ks down into their bowl-shaped nests. Despite the evidence of collaboration between masked booby parents and their firstborn chick in siblicide, Anderson has not yet completed analyzing data to answer the ultimatequestion: the long-term effects on booby adults forced to raise two chicks. But preliminary dat...