There are some major evolutionary jumps that seem to have occurred only once. Eukaryotic cells contain membrane-enclosed structures to perform different functions, and they comprise all forms of multicellular life on Earth. They arose from prokaryotes only once in four billion years, and no prok... Read More
The Terminator. The Borg. The Six Million Dollar Man. Science fiction is ripe with biological beings armed with artificial capabilities. In reality, however, the clunky connections between living and non-living worlds often lack a clear channel for communication. Now, scientists with the Lawrenc... Read More
By any other name, the Anopheles gambiae mosquito would still bear—with its tiny buzzing wingbeats—the deadly threat of malaria, which can be passed to humans in a single blood-sucking bite. But what if this species were to split in twain?
Two new studies, published online October 21 in Scien... Read More
It's common knowledge that the U.S. no longer produces enough scientists and engineers to keep pace with the rest of the world. Now, the organizers of the USA Science & Engineering Festival are doing something about it, with a two-week, nationwide extravaganza for left-brain-leaning young people... Read More
Social media consists of Internet technologies that allow users to create and share content, and to foster dialogues among other users. Examples include software applications for communication (blogging, social networking, discussion forums), collaboration (wikis, social bookmarking), and multim... Read More
Biofilms: whether it’s coating the opening of a geyser in Yellowstone Park or lining the surface of your shower curtain, the signaling molecule cyclic diguanylate (c-di-GMP) essentially tells bacteria in these ecosystems when to get-up-and-go or when to settle down and get comfortable. By regul... Read More
America is angry: about lost jobs, the ballooning deficit, and the apparent failure of massive "stimulus" spending to improve the lot of citizens hammered by the worst economic slump since the 1930s. Above all, Americans are angry with politicians who promised change for the better.
As the co... Read More
Broccoli, a vegetable already renowned for its cancer-fighting potential, might now become an even more potent enemy to tumors everywhere. Scientists have made a key discovery into how the cruciferous veggie's compounds are used by the body, meaning that a little tinkering could make its protect... Read More
Feeling stuffy and miserable? Forgot your flu jab this year? What you need is a vaccine that will stop flu once and for all – and prospects for one have just got brighter.
A protein touted as flu's Achilles' heel when it was discovered last year has now been tested as a vaccine, and it worked... Read More
Although getting an HIV infection via a blood transfusion in the United States is rare, federal health officials say it is possible and has occurred.
A report, published in the Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report, details the case of a patient wh... Read More
To make it harder for bioterrorists to build dangerous viruses from scratch, guidelines for firms who supply "custom DNA" are being introduced in the US.
The US and other countries restrict who can work with certain germs, but it might be possible to build some viruses from their genes. A num... Read More
Childhood was a hazy mix of lace and mud — an age of cookie time, horseplay and the occasional cootie shot. It seems like a far cry from the fettered world of adulthood.
But there were darker forces at play, infiltrators that showed up everywhere we were — near us, on us, in us. Some working ... Read More
Neurologists have found that the brain plaques associated with Alzheimer's can form when the proteins responsible are injected into the bellies of mice, suggesting that the guilty proteins can get from the body's periphery to wreak havoc in the brain.
A protein called beta-amyloid makes up th... Read More
A continuación: ARN regulador, descifrando la vitamina B12, la pérdida de biodiversidad, y la búsqueda de probióticos con habilidades de supervivencia especiales.
An outbreak of severe diarrhea in rural central Haiti has killed at least 135 people and sickened hundreds more who overwhelmed a crowded hospital on Thursday seeking treatment.
Health workers suspected the cause was cholera, but were awaiting tests.
Hundreds of patients lay on blankets i... Read More
The cells and tissues in our bodies grow, develop and interact in a highly complex, three-dimensional world. Likewise, the various microbial pathogens that invade our bodies and cause infectious disease interact with this complex 3-D tissue milieu. Yet the methods of culturing and studying human... Read More
Texas health officials have shut down a processing plant linked to contaminated celery that sickened at least six people this year, four of whom died, and led to the recall of all of the produce that passed through the plant since January.
SanGar Produce & Processing Co. issued the recall Wed... Read More
Scientists at The University of Nottingham and the Wellcome Trust Sanger Institute near Cambridge have pin-pointed the 72 molecular switches that control the three key stages in the life cycle of the malaria parasite and have discovered that over a third of these switches can be disrupted in som... Read More
When confronted with a virus, several cell types in the immune system go about producing interferons, which get the ball rolling, so to speak, and mobilize the innate immune system against the invader. Unfortunately for us, coronaviruses, which include SARS-CoV and many cold viruses, inhibit in... Read More
The 21st century is all about conserving energy. The push towards energy-efficient buildings, vehicles and lifestyles is both fashionable and necessary, but it’s also ironic. Our pattern of ever-increasing energy consumption is deeply rooted in our history, not just since the Industrial Revoluti... Read More