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Tag: "fossil" at biology news

Researchers find 6,000-year-old fossil evidence

...he University of Missouri-Columbia, recently found fossil evidence in seven archaeological sites ranging from the Bahamas to present-day Peru that showed people were eating domesticated chili peppers as long as 6,000 years ago. This makes chili peppers one of the oldest domesticated food sources in the Amer...

40,000-year-old skull shows both modern human and Neandertal traits

...d chronologically intervening specimens. But this fossil is a major addition to the growing body of fossil, genetic and archaeological evidence indicating significant levels of biological and cultural interaction between modern humans and the anatomically archaic populations (including the Neandertals) the...

Custom-made cancer cell attacks

...reenhouse gases, not because we are running out of fossil fuels, he added. ''There are reserves of coal for 200 years at least, and coal can be liquefied into fuel, but it produces an awful lot of CO2,'' he explained. Biofuels, on the other hand, are carbon-neutral sources of energy, Somerville said, not...

Cellulosic ethanol: Fuel of the future?

...reenhouse gases, not because we are running out of fossil fuels, he added. ''There are reserves of coal for 200 years at least, and coal can be liquefied into fuel, but it produces an awful lot of CO2,'' he explained. Biofuels, on the other hand, are carbon-neutral sources of energy, Somerville said, not...

Birth rate, competition are major players in hominid extinctions

...und 2.5 million years ago, but disappears from the fossil record a million years ago. Paranthropus boisei became extinct when it was unable to compete with other mammals. A specialized feeder, Paranthropus boisei dined on hard objects like seeds, tubers and bones. While it had a variety of food sources...

Scientists map air pollution using corn grown in US fields

Scientists at UC Irvine have mapped fossil fuel air pollution in the United States by analyzi...or and regulate the release of carbon dioxide from fossil fuel sources to limit greenhouse gas warming," said James Randerson, associate professor of Earth sy...

Lower carbon dioxide emissions from coal-fueled power plants possible with technology development

... Richard Wistrand, senior vice president and chief fossil officer, TXU Power. “TXU has outlined a vision to lower carbon dioxide emission rates through development of new technologies, and Dr. Rochelle’s research will undoubtedly make great strides toward this development.? Rochelle spent the past six yea...

Meeting the ethanol challenge: Scientists use supercomputer to target cellulose bottleneck

...ss a realistic 'carbon neutral' alternative to the fossil petroleum used today for transportation fuels." The results were reported in the April 12 online edition of the Protein Engineering, Design and Selection journal, which also featured visualizations of the results on the cover. A convergence of ...

Study finds mercury prevalent in many western fish

...away as China, the burning of heavy oils and other fossil fuels, and even forest fires. In the survey, the researchers did find 13 fish from eight different sites that had very high mercury concentrations ?levels of 1.0 microgram or higher ?likely indicating a point source. These high levels could be cau...

'Terror bird' arrived in North America before land bridge, study finds

...y at UF. "But the rare earth element analysis of a fossil Titanis bone from Texas determines its age to be 5...and a head larger than a man's. It is known in the fossil record from a single toe bone in Texas, and in Florida by about 40 bone fragments from different ske...

How fish conquered the ocean

...gen, Norway. "To the contrary", Dr Finn says, "the fossil record shows that the ancestors of the bony fishes...ace as evidenced by their sudden appearance in the fossil records of marine sediments. The basis for this successful radiation is unexplained and has intrigue...

Volcanic eruptions, ancient global warming linked

...g period came through correlations with the marine fossil record. Dramatic changes in the carbon-isotopic composition of the ocean, corroded plankton shells, and the extinction of some bottom-dwelling organisms characterize the PETM. This interval occurred about 300,000 years before the ash layer, at the pe...

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

...a decade to compile the tree of life from existing fossil records and new molecular analyses. They show that many of the genetic 'ancestors' of the mammals we see around us today existed 85 million years ago, and survived the meteor impact that is thought to have killed the dinosaurs. However, throughout th...

Does evolution select for faster evolvers?

...ion appear to increase with time. For example, the fossil record indicates that single-celled life first appeared about 3.5 billion years ago, and it then took about 2.5 billion more years for multi-cellular life to evolve. That leaves just a billion years or so for the evolution of the diverse menagerie of...

Something new under the sun

...ses the climate is often adjusted with the help of fossil fuels: the heating in the greenhouse is switched on. Furthermore the greenhouse can be ventilated to decrease humidity and reduce the temperature. Thanks to modifications and Van Ooteghem's new control system less energy is lost and excess heat is re...

U of M researchers invent 'flashy' new process to turn soy oil, glucose into hydrogen

...s faster than current technology, with no input of fossil fuels and in reactors at least 10 times smaller th... to biodiesel requires the addition of methanol, a fossil fuel. The new process skips the biodiesel step and turns oil straight into hydrogen and carbon monox...

Novel experiment documents evolution of genome in near-real time

... are moving targets. "Paleontologists look at the fossil record to study how evolution of dinosaurs and oth...published genomic sequences of bacteria are like a fossil record and our experiments confirm that these genomes can change quickly as bacteria adapt to new co...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...ons to account for the sudden increase of dinosaur fossil discoveries during the 1990s."The 1990s saw an 85% increase in the number of new fossil discoveries," Dodson said. "The dinosaur field used to be the pursuit of white Anglo-Saxons, but, w...

A buffet for early human relatives

...ty of Utah scientists improved a method of testing fossil teeth, and showed that early human relatives varie... on Prehistoric Teeth The study analyzed four fossil teeth of Paranthropus from Swartkrans, South Africa. A museum loaned them to the researchers. Passey...

Reef warns of sea level rise

...hey may have to cope with under global warming. A fossil coral reef, lying several metres above today's hig...ologically stable, has a number of both living and fossil coral reefs along it, the results of the Leeuwin current bringing coral larvae down from Indonesia a...

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