Smithsonian scientists and colleagues report a new study that may shake up the way paleontologists think about how environmental change shapes life on Earth. The researchers summarized the environmental, ecological and evolutionary consequences for Caribbean shallow-water marine communities when the Isthmus of Panama was formed. They concluded that extinctions resulting when one ocean became two were delayed by 2 million years.
Your football coach always told you that the low man wins. Seems that ape-like ancestors may have evolved that way for the same reason.
Australopiths maintained short legs for 2 million years because a squat physique and stance helped the males fight over access to females, a University of Utah study concludes.
Researchers at the University of Pennsylvania Schools of Medicine and Veterinary Medicine have determined a way to pre-screen cancer patients to see if they are suitable candidates for proteasome inhibitors, a promising class of anti-cancer drugs. They propose to test for p53, a well-known tumor-suppressor protein that is broken down by cellular machinery called proteasomes. This study appears online in the journal Blood, in advance of print publication in June 2007.
Understanding the origin and behavior of the magnetic fields of planets and stars is the goal of research being carried out by many teams from all over the world. The VKS1 collaboration (CEA2, CNRS3,4, Ecole normale supérieure in Lyon3, Ecole normale supérieure in Paris4) has succeeded in creating in the laboratory a magnetic field in a highly turbulent flow of liquid sodium.
Cuttlefish are well-known masters of disguise who use highly developed camouflage tactics to blend in almost instantaneously with their surroundings. These relatives of octopuses and squid are part of a class of animals called cephalopods and are found in marine habitats worldwide. Cephalopods use camouflage to change their appearance with a speed and diversity unparalleled in the animal kingdom, however there is no documentation to date that they use their diverse camouflage repertoire at night.
The first detailed images of an elusive drug target on the outer wall of bacteria may provide scientists with enough new information to aid design of novel antibiotics. The drugs are much needed to treat deadly infections initiated by Staphylococcus aureus and other bacterial pathogens.
A project by University of Wisconsin-Madison researchers has come one step closer to making fusion energy possible.
ver wonder why some women seem to be more ill-tempered than others? University of Pittsburgh researchers have found that behaviors such as anger, hostility and aggression may be genetic, rooted in variations in a serotonin receptor gene. Indrani Halder, Ph.D., of the Cardiovascular Behavioral Medicine Program at the University of Pittsburgh, will present the findings today at the American Psychosomatic Society's Annual Meeting, held in Budapest, Hungary.
Two new studies by University of California, Berkeley, scientists highlight the amazing promiscuity of genes, which appear to shuttle frequently between organisms, especially more primitive organisms, and often in packs.
Such gene flow, dubbed horizontal gene transfer, has been seen frequently in bacteria, allowing pathogenic bacteria, for example, to share genes conferring resistance to a drug. Recently, two different species of plants were shown to share genes as well. The questions have been: How common is it, and how does it occur?
A protein known as the "master watchman of the genome" for its ability to guard against cancer-causing DNA damage has been found to provide an entirely different level of cancer protection: By prompting the skin to tan in response to ultraviolet light from the sun, it deters the development of melanoma skin cancer, the fastest-increasing form of cancer in the world.
Could you survive a day like Jack Bauer has on the Fox television show "24?" Maybe not, and it might not be just because you lack counter-terrorism training.
Researchers at Texas A&M University are shedding light on a rare form of early blindness, identifying the cells involved and paving the way for possible therapies to treat or even prevent what is currently an incurable disease.
The findings, funded by Fight for Sight and the National Institutes of Health, are published in the March 5-9 online Early Edition (EE) of the Proceedings of the National Academy of Sciences.
Americans in their early to mid-50s today report poorer health, more pain and more trouble doing everyday physical tasks than their older peers reported at the same age in years past, a recent analysis has shown.
So do baby boomers just complain more than their ancestors or are they actually worse off?
The research, published in print and online this week by the nonprofit National Bureau of Economic Research (NBER), was supported by the National Institute on Aging (NIA), a component of the National Institutes of Health.
Biofuels have been an increasingly hot topic on the discussion table in the last few years. In 2003 the European Union introduced a Directive suggesting that Member states should increase the share of biofuels in the energy used for transport to 2% by 2005 and 5.75% by 2010. In 2005 the target was not reached and it will probably not be reached in 2010 either (we are in 2006 at approximately 0.8%), but anyway the Directive showed the great interest that the European Commission places on biofuels as a way to solve many problems at once.
Humans acquired pubic lice from gorillas several million years ago, but this seemingly seedy connection does not mean that monkey business went on with the great apes, a new University of Florida study finds.
Rather than close encounters of the intimate kind, humans most likely got the gorilla's lice from sleeping in their nests or eating the giant apes, said David Reed, assistant curator of mammals at the Florida Museum of Natural History on the UF campus, one of the study's authors. The research is published in the current edition of the BMC Biology journal.