New research proves single origin of humans in Africa
...e (19 July) has proved the single origin of humans theory by combining studies of global genetic variations ...rancois Balloux explains: "To test the alternative theory for the origin of modern humans we tried to find an additional, non-African origin. We found this ju...Has science unearthed the Holy Grail of pain relief?
...ey were therefore able to deduce from evolutionary theory that it was these similar parts of the molecule that probably regulate pain in humans. Its a big step forward in understanding how the molecule works and should make it possible to develop drugs that block the receptors actions, said Dr Thompson. ...Norwegian council names ASU researcher 'Outstanding Young Investigator'
...h. Dr. Amdams research is at the cutting edge of theory and empirical studies of life history evolution and will have a broad impact on our understanding of the effects of social environments on aging, according to Robert Page, director of the School of Life Sciences and a fellow honeybee researcher in th...Tiny tweezers and yeast help St. Jude show how cancer drug works
... those studies, scientists developed the supercoil theory to explain the drugs ability to kill cancer cells, and then tested that theory in yeast cells. Their conclusionthat accumulation of DNA supercoiling kills the cellsprovides a nove...Birds take cues from their competitors
...ions, according to the researchers. Conventional theory of species coexistence predicts that overlap in resource use between species results in costs and divergence of niches, Seppnen said. However, our results suggest that if information possessed by another specieseven by a strong competitoris valuable ......e interglacial period we currently live in. This theory however, was not confirmed by Willerslev and co-workers subsequent datings. He analysed the insects mitochondria, which are special genomes that change with time and like a clock can be used to date the DNA. He also analysed their amino acids which a...Malaria-resistant mosquitoes battle disease with 'molecular warhead'
...area, Dr. Baxter said. This finding reinforces the theory that the warhead is a key element of the overall immune response to malaria in mosquitoes. In future studies, the researchers will genetically manipulate the warhead to study its binding properties, Dr. Baxter said. In addition, further research is...Amoebae control cheating by keeping it in the family
...ething that's been long predicted by kin selection theory -- a mutant that cheats when relatedness is low cannot and has not spread in the wild because of natural relatedness," Queller said. Gilbert said, "Our results answer the big question of why altruism persists. It persists because high relatedness p...Discovery could help bring down price of DNA sequencing
...the base nucleotides that make up DNA.) Using a theory based on classical hydrodynamics, a Northwestern University researcher now has explained the nature of the resistive force that determines the speed of the DNA as it moves through the nanopore, which is just five to 10 nanometers wide. (One nanometer...Autism theory put to the test with new technology
...lity that affects over 50,000 Canadians. A current theory of autism is that individuals with the disorder ha... you are throwing it yourself, Welsh explains. The theory is that a person with autism may not be able to mirror the actions of other individuals. So in our e...Support for chromosomal theory of cancer found in cancers' development of drug resistance
...rding to his novel yet controversial "chromosomal" theory of cancer, which is receiving increased attention ...que, and there is no magic bullet. "The mutation theory of cancer says that a limited number of genes causes cancer, so cancers should all be more or less t...Which came first: Primates' ability to see colorful food or see colorful sex?
...te among evolutionary biologists. The conventional theory is that primates evolved trichromatic color vision to assist them in foraging, specifically by allowing them to detect red/orange food items from green leaf backgrounds. However, the results from several empirical studies have called into question th...Ancient retrovirus sheds light on modern pandemic
... but left no traces of having infected humans. Our theory is that this is because humans had this innate viral defense system," Emerman said. To test their hypothesis, Emerman and co-authors Harmit Singh Malik, Ph.D., an evolutionary biologist and an assistant member of the Center's Basic Sciences Division,...Mathematics reveals genetic pattern of tumor growth
...he Royal Society journal Interface. Mathematical theory can help us understand cancer, said Komarova, asso...ed a mathematical technique called optimal control theory in which they considered a tumor with set characteristics, then changed the cell mutation variable t...International team to honor 30th anniversary of deep-sea vent discovery in Galpagos
...of the world where Charles Darwin first formed his theory of evolution," she said. Roughly 50 scientists will attend the meeting, funded by the Alfred P. Sloan Foundation, which will include discussions about new-and controversial-issues facing vent science such as the onset of deep-sea mining and plans...Autism-related proteins control nerve excitability, researchers find
... of excitatory and inhibitory nerve connections, a theory supported by this study, said Dr. Ege Kavalali, associate professor of neuroscience and physiology at UT Southwestern and an author of the paper. Mutations in these proteins have recently been linked to certain varieties of autism, Dr. Kavalali sa...Researchers pit novel version of common virus against cancer
...TP and replicating only in malignant cells. This theory was a terrific but it had one big problem: you cannot test it in people because you cannot give people HIV, explained Kim. So we had to find another route. Thats when we came up with the idea of modifying the adenovirus with dNTP. Thus, the Rochest...Study identifies 5 genetic themes key to keeping stem cells in a primitive, flexible state
...Dr. Michael Rudnicki, referring to the often-cited theory of everything for physics. Dr. Rudnicki is a Senior Scientist and Professor at the Ottawa Health Research Institute and the University of Ottawa. He also leads the Sprott Centre for Stem Cell Research in Ottawa and Canadas Stem Cell Network. While...Nobel scientists Craig Mello and John Mather to speak on origins of life and universe
...thin 50 parts per million, confirming the Big Bang theory to extraordinary accuracy. Craig Mello is the Blais Professor of Molecular Medicine and an Investigator with the Howard Hughes Medical Institute at the University of Massachusetts Medical School. His research is focused on gene regulation during ...