Proteaceae spread by continental drift and transoceanic dispersal
...Barker et al. apply a technique known as molecular dating to DNA sequences from over 40 representatives of the family from all southern continents. Using carefully selected fossils that are of known age and affinity, the mutation rate of the DNA sequences was calculated, allowing these scientists to provide...Rise of dinosaurs in Late Triassic more gradual than once thought
...s of crocodile ancestors, fish and amphibians, all dating between 220 and 210 million years ago. The Science report also details their discovery of the leg bones (femurs) of the carnivorous Chindesaurus bryansmalli (SHIN dee SOAR us) and a close relative of the carnivorous Coelophysis (SEE low FIE sis), a w...University of Colorado licenses two influenza virus detection discoveries to Quidel Corp.
...of 62 influenza B virus samples from 19 countries, dating from 1945 to 2005, as well as five negative control samples, the BChip exhibited 97% sensitivity and 100% specificity, with no false positives. The two new chips help strengthen Quidels technology foundation in molecular diagnostics; they represent...New perspectives for the geosciences and climate research
...ey are primarily designed for performing carbon 14 dating or are too low-powered, with a terminal voltage of 3 MV. This has meant that researchers from Germany have had to perform their experiments abroad, for example at the ETH in Zurich, Switzerland, or at the Lawrence Livermore Laboratory, USA, which inv......by year. They advocate two further datings. One is dating by optically stimulated luminescence. It is a meth...onger came in contact with the atmosphere. The dating of dust particles also showed that it has been at least 450,000 years ago since the area of the DYE-...Wolves of Alaska became extinct 12,000 years ago, scientists report
...tists analyzed DNA samples, conducted radio carbon dating and studied the chemical composition of ancient wo...5,000 years ago probably earlier, but radio carbon dating does not allow for the establishment of an earlier date until approximately 12,000 years ago, Van V...Marine worm opens new window on early cell development
...re are some 10,000 species of polychaete annelids, dating back to the Paleozoic era, which started 542 million years ago. Polychaete refers to many hairs or many bristles that come off protrusions of the worms bodies, which consist of fluid-filled tubes within tubes. These worms are bilaterally symmetrical ...Study helps preserve Arctic whale, Eskimo subsistence hunt
...le for Eskimos and other indigenous arctic peoples dating to prehistoric times. Due in part to research done by Purdue University professor John Bickham, the International Whaling Commission ruled last week to allow Eskimos to harvest 56 whales per year, the same quota that had been in place but had expired...Alcohol use during pregnancy leads to greater risk of extreme preterm delivery
... University. "In most previous studies, pregnancy dating was much less certain; but we used ultrasound dating. Its like listening to FM radio, rather than AM radio that has a lot of static; it is easier to hear whats being said with less noise in the background." Sokol and his colleagues collected data...Oregon researchers involved in new Clovis-age impact theory
...of those ingredients were found worldwide in soils dating to the K-T Boundary of 65 million years ago. The K-T layer marks the end of the Cretaceous Period and the beginning of the Tertiary Period, when numerous species were wiped out after a massive asteroid is believed to have struck Mexico's Yucatan Pe...Egyptians, not Greeks were true fathers of medicine
Scientists examining documents dating back 3,500 years say they have found proof that the origins of modern medicine lie in ancient Egypt and not with Hippocrates and the Greeks. The research team from the KNH Centre for Biomedical Egyptology at The University of Manchester discovered ...Puzzling plankton yield secrets to role in evolution/global photosynthesis
... at the primitive root of the green plant lineage, dating back nearly 1.5 billion years. Today, these microscopic, free-living creatures, among the smallest eukaryotes ever characterized, barely a micron in diameter, contribute to a significant share of the worlds total photosynthetic activity. These "pico...ACS News Service Weekly PressPac -- April 18, 2007
...limited mainly to the existence of metal artifacts dating to about 1,000 A.D. and the Wari Empire that preceded the Inca. The new evidence emerged from a study of metallurgical air pollutants released from ancient furnaces during the smelting process and deposited in lake sediments in the area. By analyzi...Mystery of fossilized trees is solved
...und evidence of the Earth's earliest forest trees, dating back 385 million years. Upright stumps of fossilised trees were uncovered after a flash flood in Gilboa, upstate New York, more than a century ago. However, until now, no-one has known what the entire trees looked like. Two years ago, two fossils...Irish potato famine disease came from South America
...10 years of studying the potato pathogen in plants dating back centuries, Ristaino has also delved in shipping records and trade patterns. South American countries mainly Peru provided potatoes and potato seed to North American, Central American, European and Irish locales throughout the 19th century. In ...Research physiologists convene for 120th Annual Meeting
...ages of historical scientific studies online, some dating back to the year 1898. MEDIA CONTACT: The findings from select research presentations, lectures and symposia will be provided in separate news releases and offered to the press on an embargoed basis on or before April 26, 2007. The releases wil...Early Europeans unable to stomach milk
...o digest milk was missing from Neolithic skeletons dating to between 5840 and 5000 BC. However, through exposure to milk, lactose tolerance evolved extremely rapidly, in evolutionary terms. Today, it is present in over ninety per cent of the population of northern Europe and is also found in some African an...Smithsonian scientists report ancient chili pepper history
... The starch microfossils were found at seven sites dating from 6,000 years ago to European contact and rangi...ns were found in southwestern Ecuador at two sites dating to 6,100 years ago. The chili remains were associated with previously identified corn, achira, arrow...DNA gives new perspectives to understand the mysteries of nature
...get a full view of total ecosystems or populations dating thousands of years back in time. The automation of a long research process Professor Eske Willerslev and his team find DNA traces of ancient life for their research in areas where the ground is permanently frozen like in Siberia or Alaska. Here,...World's oldest rocks show how Earth may have dodged frozen fate of Mars
...te Jon Adam used a technique known as uranium-lead dating to establish the ancient age of the Hudson Bay roc...nalyzed the rocks by crushing them into powder and dating zircon crystals present in the rock, said Mojzsis. The technique allowed them to calculate the geol...