Female western bluebirds that have to compete for nesting sites produce more early-hatching male chicks than do females with fewer competitors. The chicks are also likely to be more aggressive. This has long-term effects on the range and behaviour of subsequent generations.Renée Duckworth and
Researchers have developed a microscopic lens with a focal length that can be controlled in less than a millisecond.Controlling the focus of an optical lens is useful for microscopy and photography, but existing reconfigurable lenses are often bulky or slow to adjust. Romain Quidant
Modern societies require more and more metals, not least for renewable energy generation. Scientists from a range of disciplines are needed to prospect for ore deposits and provide a basis for sustainable exploration.
The status of sea floors is an important part of healthy marine ecosystems and intact coastlines. We need laws and a sea-floor management regime to make the exploitation of marine resources sustainable.
Ore bodies buried deep in Earth's crust could meet increasing global demands for metals, but mining them would be costly and could damage the environment. Reinventing an ancient technology for bioleaching metals could provide a solution.
Boreal forest fires tend to be more intense and lethal in North America than Eurasia. Differences in tree species composition explain these differences in fire regime, and lead to contrasting feedbacks to climate.
Metals often accumulate in the crust beneath volcanoes. Laboratory experiments and observations reveal important roles for magmatic vapours and brines in transporting and concentrating the metals into deposits worth targeting for extraction.
Large numbers of microorganisms colonise the skin and mucous membranes of animals, with their highest density in the lower gastrointestinal tract. The impact of these microbes on the host can be demonstrated by comparing animals (usually mice) housed under germ-free conditions, or colonised with different compositions of microbes. Inbreeding and embryo manip […]
Li, H., Limenitakis, J. P., Ganal, S. C., Macpherson, A. J.
Neutrophils play critical roles in innate immunity and host defense. However, excessive neutrophil accumulation or hyper-responsiveness of neutrophils can be detrimental to the host system. Thus, the response of neutrophils to inflammatory stimuli needs to be tightly controlled. Many cellular processes in neutrophils are mediated by localized formation of an […]
Two C57BL/6 mice colonies maintained in two rooms of the same specific pathogen-free (SPF) facility were found to have different gut microbiota and a mucus phenotype that was specific for each colony. The thickness and growth of the colon mucus were similar in the two colonies. However, one colony had mucus that was impenetrable to bacteria or beads the size […]
Jakobsson, H. E., Rodriguez-Pineiro, A. M., Schutte, A., Ermund, A., Boysen, P., Bemark, M., Sommer, F., Backhed, F., Hansson, G. C., Johansson, M. E.
In Drosophila, fibrillar flight muscles (IFMs) enable flight, while tubular muscles mediate other body movements. Here, we use RNA-sequencing and isoform-specific reporters to show that spalt major (salm) determines fibrillar muscle physiology by regulating transcription and alternative splicing of a large set of sarcomeric proteins. We identify the RNA-bind […]
Spletter, M. L., Barz, C., Yeroslaviz, A., Schonbauer, C., Ferreira, I. R. S., Sarov, M., Gerlach, D., Stark, A., Habermann, B. H., Schnorrer, F.
Glial cell line-derived neurotrophic factor (GDNF) is in clinical trials for treating Parkinson's disease. However, endogenous GDNF function in brain catecholaminergic neurons has remained controversial. The authors utilized three complementary conditional knock-out approaches during development and adulthood and found that GDNF is not required for the […]
Arkive’s Week in Review — Wildlife News ICYMI: Arkive has compiled some of the biggest and most interesting headlines from this week. Article originally published on Friday, Feb 20, 2015 Evolution favors the big: Marine mammals have grown larger over time The average marine creature today is about 150 times larger than its counterparts that […]
We’re thrilled to kick off our first Arkive’s Conservation Heroes series with the incredible Dr. Laurie Marker, a woman who founded the Cheetah Conservation Fund (CCF) in Namibia, Africa dedicated to restoring the wild cheetah. In this interview, Dr. Marker shares why she started a nonprofit, an average day-in-the-life at CCF, and her one dream for […] […]
What makes for successful conservation? Sometimes, it takes a Hero. For the past 11 years, Arkive has strived to build an unparalleled collection of the world’s best images and films of wildlife and habitats around the globe. Currently, Arkive shares the story of over 16,000 species with over 100,000 stunning photographs and film clips from […]
Arkive’s Week in Review — Wildlife News ICYMI: Arkive has compiled some of the biggest and most interesting headlines from this week. Article originally published on Friday, Feb 13, 2015 Male black widows smell hungry cannibal females Female black widows only eat courting males about 2% of the time. However, just in case, males can […]