Prozac in ocean water a possible threat to sea life
Fri, 20 Oct 2017 12:58:09 EDT
Oregon shore crabs exhibit risky behavior when they're exposed to the antidepressant Prozac, making it easier for predators to catch them, according to a new study.
How the smallest bacterial pathogens outwit host immune defenses by stealth mechanisms
Fri, 20 Oct 2017 10:16:24 EDT
Despite their relatively small genome, mycoplasmas can cause persistent and difficult-to-treat infections in humans and animals. A study has shown how mycoplasmas escape the immune response. Mycoplasmas 'mask' themselves: They use their small genome in a clever way and compensate for the loss of an enzyme that is important for this process. This could be shown for the first time in vivo, thus representing a breakthrough in the research of bacterial pathogens.
'Antelope perfume' keeps flies away from cows
Fri, 20 Oct 2017 10:16:21 EDT
In Africa, tsetse flies transfer the sleeping sickness also to cattle. The damage is estimated to be about 4.6 billion US dollars each year. Experts have developed an innovative way of preventing the disease. Tsetse flies avoid waterbucks, a widespread antelope species in Africa. The scientists imitated the smell of these antelopes.
Chromosomes may be knotted
Fri, 20 Oct 2017 10:16:18 EDT
Little is known about the structures of our genetic material, chromosomes, which consist of long strings that -- according to our experience -- should be likely to become knotted. However, up to now it has not been possible to study this experimentally. Researchers have now found that chromosomes may indeed be knotted.
Carbon coating gives biochar its garden-greening power
Fri, 20 Oct 2017 10:16:15 EDT
New research has demonstrated how composting of biochar creates a very thin organic coating that significantly improves the biochar's fertilizing capabilities.
Logged tropical rainforests still support biodiversity even when the heat is on
Fri, 20 Oct 2017 09:22:42 EDT
Tropical rainforests continue to buffer wildlife from extreme temperatures even after logging, a new study has revealed.
Waterside lighting drastically disrupts wildlife in the surrounding ecosystem
Fri, 20 Oct 2017 09:22:29 EDT
Streetlights near waterways attract flying insects from the water and change the predator community living in the grass beneath the lights, new research has found. The findings show that artificial night-time lighting could have implications for the surrounding ecosystem and biodiversity, which should be considered when designing new lighting concepts.
Life goes on for marine ecosystems after cataclysmic mass extinction
Fri, 20 Oct 2017 09:22:26 EDT
One of the largest global mass extinctions did not fundamentally change marine ecosystems, scientists have found.
New NASA study improves search for habitable worlds
Thu, 19 Oct 2017 18:18:49 EDT
New NASA research is helping to refine our understanding of candidate planets beyond our solar system that might support life.
Climate shifts shorten marine food chain off California
Thu, 19 Oct 2017 17:16:37 EDT
Environmental disturbances such as El NiƱo shake up the marine food web off Southern California, new research shows, countering conventional thinking that the hierarchy of who-eats-who in the ocean remains largely constant over time.
Research yields test to predict bitter pit disorder in Honeycrisp apples
Thu, 19 Oct 2017 16:43:00 EDT
A test to determine whether bitter pit -- a disorder that blindsides apple growers by showing up weeks or months after picking -- will develop in stored Honeycrisp apples was developed by a team of researchers, promising to potentially save millions of dollars annually in wasted fruit.
Field trips of the future?
Thu, 19 Oct 2017 16:42:20 EDT
A biologist examines the benefits and drawbacks of virtual and augmented reality in teaching environmental science.
New tyrannosaur fossil is most complete found in Southwestern US
Thu, 19 Oct 2017 14:30:40 EDT
A fossilized skeleton of a tyrannosaur discovered in Utah's Grand Staircase-Escalante National Monument was airlifted by helicopter Oct 15, and delivered to the Natural History Museum of Utah where it will be uncovered, prepared, and studied. The fossil is approximately 76 million years old and is likely an individual of the species Teratophoneus curriei.
Studying insect behavior? Make yourself an ethoscope!
Thu, 19 Oct 2017 14:30:37 EDT
Fruit flies have surprising similarities to humans. The mysteries of a broad range of human conditions can be studied in detail in these organisms, however this often requires the use of expensive custom equipment. team of scientists now present the ethoscope -- a cheap, easy-to-use and self-made customizable piece of equipment of their invention that can be used to study flies' behavior.
Flu simulations suggest pandemics more likely in spring, early summer
Thu, 19 Oct 2017 14:30:27 EDT
New statistical simulations suggest that Northern Hemisphere flu pandemics are most likely to emerge in late spring or early summer at the tail end of the normal flu season, according to a new study.
Ancient DNA offers new view on saber-toothed cats' past
Thu, 19 Oct 2017 14:30:18 EDT
Researchers who've analyzed the complete mitochondrial genomes from ancient samples representing two species of saber-toothed cats have a new take on the animals' history over the last 50,000 years. The data suggest that the saber-toothed cats shared a common ancestor with all living cat-like species about 20 million years ago. The two saber-toothed cat species under study diverged from each other about 18 million years ago.
Gut bacteria from wild mice boost health in lab mice
Thu, 19 Oct 2017 14:30:12 EDT
Laboratory mice that are given the gut bacteria of wild mice can survive a deadly flu virus infection and fight colorectal cancer dramatically better than laboratory mice with their own gut bacteria, researchers report.
Evolution in your back garden: Great tits may be adapting their beaks to birdfeeders
Thu, 19 Oct 2017 14:30:10 EDT
A British enthusiasm for feeding birds may have caused UK great tits to have evolved longer beaks than their European counterparts, according to new research. The findings identify for the first time the genetic differences between UK and Dutch great tits which researchers were then able to link to longer beaks in UK birds.
H7N9 influenza is both lethal and transmissible in animal model for flu
Thu, 19 Oct 2017 14:30:07 EDT
In 2013, an influenza virus began circulating among poultry in China. It caused several waves of human infection and as of late July 2017, nearly 1,600 people had tested positive for avian H7N9. Nearly 40 percent of those infected had died. In 2017, a medical researcher received a sample of H7N9 virus isolated from a patient in China who had died of the flu. He and his research team subsequently began work to characterize and understand it.
Water striders illustrate evolutionary processes
Thu, 19 Oct 2017 14:29:34 EDT
How do new species arise and diversify in nature? Natural selection offers an explanation, but the genetic and environmental conditions behind this mechanism are still poorly understood. Researchers have just figured out how water striders (family Veliidae) of the genus Rhagovelia developed fan-like structures at the tips of their legs. These structures allow them to move upstream against the current, a feat beyond the abilities of other water striders that don't have fans.