Tag: "evolution" at biology news
UB Researcher Developing Method That Employs "Evolution" To Identify New Drug Leads
...ased on the application of Darwinian principles of evolution
to a chemical system, the method is designed to en...inders it just lost." In the same way that natural evolution
plays out over the course of many generations, chemical evolution
occurs over the course of many rep...
Carnegie Mellon Researchers Develop Nation's First Robotic Tour Guide For The
Dinosaur Hall At Pittsburgh's Carnegie Museum Of Natural History
...ast 10 years alone, much has been learned aboutthe evolution
and demise of the dinosaurs, but the experience of museum visitorshas remained the same as it has been for more than a century. The 'Sage' robot consists of a standard platform, a product of NomadicTechnologies, Inc., (Mountain View, Calif.)...
Tiny Jamaican Tree Crab Made Big And Fast Evolutionary Leap, Scientists Discover
...s began evolving only 4 million yearsago, so their evolution
has been quite rapid," Hedges says. "This date makessense because it corresponds to a time in Jamaica's geologic history when theland had risen far enough out of the sea to provide new ecological niches forthe ancestral marine crab that began evolvi...
Can Contaminated Aquifers Restore Themselves?
...hemical, andmicrobiological processes that control evolution
of the ground-waterenvironment as contaminant levels naturally attenuate? Can we reconcilerates for these processes observed in the laboratory with rates observed inthe field? How do physical and geochemical heterogeneities in the naturalenvironmen...
Does Mountain Living Slow Rate Of Molecular Evolution?
...ace at which evolution
marches may be dependent, to one degree or another, on environment. And those influences, Bleiweiss argues, may prove to be widespread and not limited to ...
Molecular "Fossils" Of Early Life
... Because DNA lends itself well to test-tube evolution
techniques, it canbe synthesized readily in the laboratory, and different strains of enzymes canbe genetically engineered for specific purposes, Professor Breaker said. Forexample, he and his colleagues have created self-cleaving DNA enzymes that ca...
International Research Team Announces Discovery Of Two Species Of Feathered
...ramatically revise their view of the stages in the evolution
ofbirds and the origin of flight. One of the many ...e than a century, scientific understanding of bird evolution
reliedalmost exclusively on a handful of fossils, all of which were discovered in thelate 1800s," sa...
New Microbial Insecticide As Potent As Bt
...ife ofboth biological insecticides by delaying the evolution
of resistant strains ofinsect pests. He described the deployment of Bt transgenic crops as the biggestexperiment in natural selection for insecticide resistance since theintroduction of chemical pesticides 50 years ago. "What we have with Photorhabdu...
Life In Antarctic Ice May Compare To Mars
...cies seemed unsure that studies of bacteria, their evolution
or behavior hadany practical value. But new applications of bacterial research in understandingthe global carbon cycle, creating new antibiotics or enzymes for industrial usehave raised increasing interest, he said. And the search for life el...
Monogamy Has Its Rewards For Flies
...ins of normal males, Holland found.In other words, evolution
stripped away much of their resistance. To see the overall result of relaxing the arms race, Holland raisedflies from each of the four lines under identical conditions. In every case,flies from monogamous lines produced more offspring than t...
Inter-Element Recombination Between Retrotransposons May Be Strategy For
Evolution Of Viruses Like HIV
...orgia have uncovered intriguingnew clues about the evolution
of retrotransposons in a genome -- evidence thatco...ia. Jordan and McDonald chose to study the evolution
of yeast retroelementsbecause the genetic sequence of the Saccharomyces cervisiae genome was the fir...
NASA Funds New Origin Of Life Center at Rensselaer Polytechnic Institute
...rdisciplinary investigation of the origin andearly evolution
of life, starting with stardust and the organic molecules formedin interstellar space, all the way to the reactions of the organics that led tothe formation of life on Earth," Ferris said. For example, research at the new center will explore the two ...
Human Ancestors Went Out Of Africa And Then Came Back: NYU/SUNY-Albany Research Team Proposes Controversial New Model for Evolution of Humans
...ellhave proposed a controversial new model for the evolution
of apes and humans,which together are called the h..., not Africa. This controversial new model for the evolution
of humans and apes is the coverstory of the July 30th issue of Current Biology. Stewart and Disotel...
Secrets Of The S.O.S Repair Service
...d beneficial mutations are the drivingforce behind evolution
because they produce genetic diversity that serves as the basis of natural selection. Understanding of this and other DNA repair mechanisms provides scientists with new insights into diseases such as cancer. Another potential application is in the a...
Engineering New Enzymes
...tructurally and functionally independent. The evolution
of proteins has generated numerous functional domains where the active site resides at the boundary of two such subdomains. Consideration of these hierarchical features of the protein architecture by recombination of subdomains from diffe...
Promiscuous Plants May Spread Genes To Weeds
...s Joy Bergelson, assistantprofessor of ecology and evolution
at the University of Chicago. Her findingswill be reported in the September 3 correspondence pages of Nature. Artificially created plants, like wild plants, can breed with closelyrelated species to produce hybrids in what is called out-cross...
Ancient 'Volcanic Winter' Tied To Rapid Genetic Divergence In Humans
...PAIGN, Ill. -- A new hypothesis about recent human evolution
suggeststhat a horrific "volcanic winter" 71,000 y...,000 people survived. "The standard view of human evolution
has been that modern populationsevolved from an ancient African ancestor. We assumed that they diffe...
Whitehead Study Supports Existence Of Ancient RNA World, Helps Provide Insight Into Early Evolution Of Life
... notion of a so-called "RNAworld," an era in early evolution
when all life forms were based on RNA. T...od of making trillions of RNA go through test-tube evolution
(a technologythat selects for the fittest molecules and introduces errors in successivegenerations o...
Symposium Explores Neandertal Question, Mystery Of Human Origins
...argues that thefossils show evidence of Neandertal evolution
on the European continent froman ancestor already separate from the evolutionary branch that led to Homosapiens. This would make Neanderthals a clearly distinct biological speciesfrom humans, despite the fact that they had similar brain capacities an...
The Evolution Of Beauty, Part Of A Special Section On The Evolution Of Sex In The 25 September 1998 Science
...Ryan's article is part of a special section on the evolution
of sex that appearsin the 25 September issue of Sc...exual advantage. Science's special section on the evolution
of sex includes four articles inaddition to Ryan's, as well as an editorial and a special news repor...
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