World's Oldest Known Fossil Reptile Nests Discovered In Arizona's Petrified Forest
... such nests ever found. The fossil nests, dating to about 220 million years ago, are similar tomodern day crocodile and turtle nests, said Stephen Hasiotis, the CU-Boulderresearch associate who discovered them. Hasiotis and colleague Anthony Martinof Emory University in Atlanta believe the nests e...Possible Human Ancestors In Spain 780,000 Years Ago
Paleomagnetic dating indicates possible human ancestors lived in Spainm...), Paresdiscussed the reliability of paleomagnetic dating and explained thecontributions it has made to increased understanding of early hominid evolutionin A...... obvious. The technique, which is based on carbon dating used to measure the age of ancient finds, will be between one hundred thousand and one million times more sensitive than traditional methods. "For the first time, pharmaceutical and other biomedical research companies all over the world can access a ...Ancient Antarctic Environment Rocked By Volcanic Eruptions
...useful because it provides material for accurately dating the strata. The layers of volcanic debris are encased within muddy sands, indicatinga relatively quiet seafloor with occasional weak currents before and after theeruptions. This relatively quiet environment, however, was disrupted at leasttw...Chinese And US Scientists Identify The World's Oldest Flowering Plant
... Dilcher said Chinese researchers used radiometric dating to place the age of Sun's and his plant at between 142 million and 148 million years old. Not that the difference is worth quibbling over. "Either way," Dilcher said, "this is still the oldest flowering plant." Furthermore, he said, that distincti...Oldest Ice Core From The Tropics Recovered, New Ice Age Evidence
... additional technique for dating old ice. Thecarbon-dating was done at Lawrence Livermore National Laboratory and at Woods Hole Oceanographic Institute and the organic material at less than 4.9 feet ...Bones of Crocodile-like Beasts Tell Tale of Global Warming
... Berkeley Geochronology Center, who did theisotope dating of the rocks; and Pat Castillo of Scripps Institute ofOceanography in San Diego, who chose which rocks to date. The project was fundedby the National Science Foundation. Also taking part in the research were several University of Rochesterstu...Fossil Eggshells Hold Clues To Major Animal Extinctions As Reported In Science
... modern day emu. Theyused a variety of alternative dating techniques (not based on radiocarbonisotopes) to analyze the birds' fossilized eggshells and set the date of Genyornis ' sudden disappearance at 50,000 years. This date loosely matches thetime of the Aborigines' arrival to the continent as indicated ...Solid Waste Incineration May Exceed Leaded Gasoline As Source Of Lead Air Pollution In Cities
...g sediment cores from New York's Central Park Lake dating back 100years, a group of scientists conclude that incineration of solid waste, ratherthan leaded gasoline, has been the dominant source of atmospheric lead to theNew York City metropolitan area, and possibly many other urban areas during the20th cen...A Real Smart Asp: Snakes Show Surprising Ability To Learn
...and find it in less than 30 seconds." Studies dating back to the 1950s interpreted snakes'clumsiness with mazes as a poor reflection on their intelligence.Holtzman's peers regard his work as groundbreaking because unlikea maze, his arena confronts snakes with a situation that they'relikely to encounter...UD Valentine Science: Cell "Dating" Habits May Promise Healthier Hearts
...atelet aggregation, or clustering,"Naik says. "The dating rituals of these cells also may shed light on how cellsmigrate from place to place, and how white blood cells--the body's policeofficers--reach the site of an infection." In 1996, Naik's identification of the CIB protein earned him the American Heart...Genetic Research Boosts Understanding Of Iron's Path Through Body, Diseases Of Iron Metabolism
...analyzing a legacy of the oldwork: strains of mice dating back to the 1920s and '30s that had defects socarefully described by hematologists that she could tell they likely hadmutations in iron transport genes. This work led her group to identify theintestinal iron transporter. At the same time, it...New Discovery May Lead To Control Of Production Of Key Proteins
... previous discoveries by Brewer and hiscolleagues, dating back to 1986. One key discovery, in 1991, was of a proteinthat they called AUF1, which binds to the messenger RNA. "It has been known for some number of years that there are enzymes thatare involved in the degradation process of proteins, jus...Some Atlantic Coast Beaches Are Shrinking While Florida's Beaches Better Off Than Most
...t and 12 on the Atlantic coast.Measurement records dating back at least a century were available for allcounties. The researchers, who used the data to create an atlas outlining theshoreline change for each county, discovered "a lot of surprising things,"Dean said. Among the most significant of thei...Fossilized Emu Eggshells Give Clues To 65,000 Years Of Vegetation And Climate Changes In Australia
...ummer precipitation and warmer temperatures. After dating and analyzing fossilized eggshell samples from the Lake Eyre Basin of Australia, the investigators conclude that between 65,000 and 45,000 years ago the C4 grasses were abundant and readily available for the emu to consume during its breeding season....USGS study casts doubt on role of fire suppression in causing catastrophic shrubland wildfires
...ny counties in California, said Keeley. The first, dating fromthe 1950s, cites urban expansion and lack of adequate zoning regulations as thecause of the problem. By the 1970s, though, an alternate view emerged that firesuppression was the primary cause of increased losses due to shrublandwildfires. The sci...Discovery of new bird species in China, oldest beak shows evolution complexity
...ld's oldest surviving horny beak, part of a fossil dating backsome 130 million years. They also say they've added more weight to the argumentthat birds descended not from dinosaurs, but rather from unknown earlier reptileancestors. "One of the really interesting things about these discoveries is tha...Burrowing mayfly swarms signal a healthier ecosystem, USGS scientists say
...dsediment of contamination. Sediment core samples, dating back to about 1740,contain jaw parts and other preserved remains that provide a continuous recordof burrowing mayfly densities in different regions of the lake. Otherinformation comes from periodic sampling of nymph populations, which began in1930, a...Oxygen measurements yield greenhouse clues
...eturning toforest. Mr Langenfelds has analysed air dating back to 1978 from CSIRO's unique'archive' of pristine air collected at the remote Cape Grim Baseline AirPollution Station operated by the CSIRO and Bureau of Meteorology innorth-western Tasmania. In the past, the isotopic composition of carbon dioxid......ing the diatoms were still alive whenfrozen. Exact dating of the samples is under way, but these ancient and stillviable microbes may be of Miocene age, possibly more than 8 million years old. "I am also very interested in pingos," Hoover continued. "We have seen evidenceof pingos in images of Mars from nea...