Tag: "evolution" at biology news

Fossil Evidence Of Worms Over One Billion Years Old Reported In Science

...il record. An important argument for this model of evolution hasbeen that no multicellular organisms have been found in rocks older than theCambrian. However, some molecular studies have suggested that soft-bodiedanimals arose well before the Cambrian, perhaps as much as 1 billion years ago.The new findings, r...

Genetically Speaking, Race Doesn't Exist In Humans

...human populations thatreveal the patterns of human evolution over the past one million years. Heshows that while there is plenty of genetic variation in humans, most of thevariation is individual variation. While between-population variation exists,it is either too small, which is a quantitative variation, o...

University Of Chicago Researcher Receives Packard Fellowship

...an Long, Ph.D., assistant professor of ecology and evolution at theUniversity of Chicago, is one of the nation's 24 recipients of the David andLucile Packard Fellowship for Science & Engineering . The Fellowship, whichprovides $650,000 over the course of five years, is awarded to young professorsin the fields...

Monkeys Have Numerical Abilities, Two Columbia Psychologists Report

... of animals, will provide a unique window into the evolution ofhuman intelligence. Prof. Terrace is best known for Project Nim, in which he tried to teacha chimpanzee named Nim Chimpsky to communicate with sign language. Nim, namedfor the philosopher and linguist Noam Chomsky, was raised and socialize...

New Study Offers A Twist On Evolution Of Animal Postures

...motion scientists seetoday. "The path of evolution usually goes from sprawling to erect. What we'resu...entists who use alligators as a model to study the evolution ofanimal locomotion from sprawling to erect, Reilly's research suggests they mayneed to find a new m...

The Fire Down Below: Extreme Heat-Loving Organisms May Be Keys To Molecular Evolution, Origin Of Life, New Book Argues

... point of water -- could be a key to unlockingboth evolution and the origin of life itself. "It appear...ics, biogeochemistry, oceanography,systematics and evolution joined for the meeting. "The conference was very significant for the thermophile field, whic...

Discovery Of New Large, Predatory Dinosaur Reported In Science

... Period," said Sereno. "Weare trying to understand evolution in a fragmenting world." A news conference will take place on Thursday, November 12 at 1 p.m. at theNational Geographic Society, 1600 M Street, NW, Washington, D. C. For moreinformation, please call Barbara Moffet, National Geographic Public Affai...

Beyond Jurassic Park: Real Science With Ancient DNA

...g this century old fungus and analyzingits genetic evolution could help identify potential biocontrol uses foreradicating the rangeland weed it infects. "We are primarily concerned with genetic changes that have occurred inpopulations of organisms during the past tens or hundreds of years up to thepresent," sa...

When Genes "Breed" In The Lab, A Suprising Number Of Their Offspring Are Supergenes

...ges of superior descendants, in a processmimicking evolution by natural selection. Maxygen's technique was described earlier this year in Nature (vol 391,p 288). Now its potential is beginning to be realised. The parent genes arefirst broken into fragments by shattering their DNA with ultrasoun...

Study Of Origin Of Species Enters The Molecular Age

...airman and professor of the department ofecology & evolution at the University of Chicago, and senior author of the paperin the November 20 issue of Science. "Geographic isolation and changes in theenvironment are only a part of what drives speciation. There are also changesat the genetic level that are driv...

Montana State University Scientist Contributes To Latest Dinosaur Discovery

... and last yearshe co wrote a Nature article on the evolution of dinosaur reproductive traits.She's also taught geology and paleontology at the Museum of the Rockies fieldschool near Choteau, Mont., for 10 years. "It's mostly my experience at Egg Mountain that got me involved in theexpedition to South A...

Researchers Probe New Depths In Plant Communications

...searchersare now trying to backtrack through plant evolution to learnwhen the gene first began to assist whole-plantcommunication. The lead authors of the Science paper are three postdoctoralresearchers in the Lucas lab: Beatriz Xoconostle-Cazares, YuXiang and Roberto Ruiz-Medrano. Their co-authors are threeot...

Large Gene Study Questions Cambrian Explosion

...e can comparethose dates to events in the chemical evolution of Earth's atmosphere and ocean,such as when oxygen and other important gases increased," Hedges explains. Research with this goal is an important focus in Penn State's AstrobiologyResearch Center. "Our goal is to see if the early history of life on...

New Clues To Evolution Of Human Brain

...been a great expansion of the frontalcortex in the evolution from monkeys to humans, pushing this older area,reserved for spatial memory, out of the way," she said. "Of course, one of thebig questions is what replaced it. From the imaging work and from studies ofpeople with damage to that part of the brain, it...

AIDS Virus May Evolve Differently In Cerebrospinal Fluid Compared With Blood In Some Patients, UCSF/Gladstone Research Finds

...uary 2). "Our data show independent viral evolution in the cerebrospinal fluidand plasma in subjects with AIDS dementia complex (ADC)," says Natalia InkinaMarlowe, PhD, lead author on the study and a postdoctoral fellow in thelaboratory of Robert Grant, MD, of the Gladstone Institute. "Those with AID...

A Fresh Look At Love And War Between The Sexes

...mics, and many otherdisciplines to analyze how the evolution of small male and large female sexcells, among many other factors including culture and environment, influencesthe way each sex behaves in the high-stakes evolutionary game of reproduction. Such an interdisciplinary approach avoids the flawed conclus...

Scientists Discover Key Cog In Receptor That Governs Ripening

...n for this protein function,"one that predates the evolution of land plants altogether. Moreover, similar genes... on, but are modified many times over the courseof evolution to fit the needs of different host organisms. The new mystery, hesaid, is precisely what role this g...

Genetic Stowaways May Contribute To Evolutionary Change: Adjacent Sequences Tag Along With Mobile DNA Elements, Study Shows

... highly specific new questions aboutthe process of evolution are being framed. Scientists would like to know whetherand how evolution operates at the molecular level in an organism's DNA. Now, experiments performed at the Univ...

Fake Photosynthesis? Test-Tube System In Science Paper Sheds Light On The Oxygen We Breathe, UD Prof Says

...y environment on Earth was quite inhospitable. The evolution ofphotosynthetic plants created oxygen and completely changed the atmosphere onour planet. That's an amazing process. Now, we can more fully explore it!" Mimicking Nature's magic tricks To change water into one of its constituent elements, dioxygen...

Secrecy In Science Focus Of AAAS-MIT Colloquium

...lecular biologist Howard Schachmanwill examine the evolution of secrecy from national security mandates, to legalnon-disclosure agreements to self-imposed secrecy by scientists. Mary Good,president of Venture Capital Investors and president-elect of AAAS, will focuson what future issues might arise in the rel...

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