The negative ecological impact of trawling for fish at depths of more than 600 metres outweighs the commercial benefits.Deep-sea fish are particularly vulnerable to overfishing because populations grow slowly. This has led to calls for a maximum depth for trawling, but it has not
A semiconductor device can amplify the tiny signal from incoming photons using much less power and creating much less noise than current methods.Previously, converting a signal from photons into a usable electrical signal required the use of two devices running at relatively high voltages
Domesticated pigs (pictured) routinely interbred with wild boars — contrary to common assumptions that humans kept their animals isolated.Humans domesticated pigs from wild boars independently in Anatolia (modern-day Turkey) and East Asia around 9,000 years ago. To learn about pig-population histories, a
The Earth underwent two snowball glaciation events between 720 and 635 million years ago. The preceding expansion of eukaryotic algae and a consequent rise in emissions of organic cloud condensation nuclei may have contributed to the dramatic cooling.
Braided channels are rare on ocean floors, but abundant on land. Experiments and theory suggest that deeper flows and rapid overbank deposition restrict braiding in underwater rivers relative to their terrestrial counterparts.
Tropospheric ozone is generated from precursor pollutants, but can be blown far afield. Satellite observations show rising ozone levels over China — and almost stable levels over western North America despite stricter regulations.
Centriole construction, now revealed by crystallography, proteomics, and imaging to be a sophisticated assembly of interlocking bricks, resembles LEGOs—albeit centrioles have remarkable dynamic capabilities, including self-assembly and dis-assembly, kinases and post-translational modifications, self-replication, and still mysterious mechanisms for transmissi […]
Ubiquitylation is among the most prevalent post-translational modifications (PTMs) and regulates numerous cellular functions. Interestingly, ubiquitin (Ub) can be itself modified by other PTMs, including acetylation and phosphorylation. Acetylation of Ub on K6 and K48 represses the formation and elongation of Ub chains. Phosphorylation of Ub happens on multi […]
Elimination of malignant cells is an unmet challenge for most human cancer types even with therapies targeting specific driver mutations. Therefore, a multi-pronged strategy to alter cancer cell biology on multiple levels is increasingly recognized as essential for cancer cure. One such aspect of cancer cell biology is the relative apoptosis resistance of tu […]
Primary cilia are specialized microtubule-based signaling organelles that convey extracellular signals into a cellular response in most vertebrate cell types. The physiological significance of primary cilia is underscored by the fact that defects in assembly or function of these organelles lead to a range of severe diseases and developmental disorders. In mo […]
Reflexes help us maintain a default posture and direction of locomotion. But what if we deliberately want to move differently? In Drosophila, the brain modifies a visually driven stabilization reflex to enable voluntary movements.
Our internal states can color our memories just as powerfully as the external environment. A study finds that hippocampal GABAA receptors and associated microRNAs are important for generating state-dependent contextual fear memories.
Dopamine loss in Parkinson's disease affects not only the basal ganglia, but also motor cortex, causing a surprising increase of spine turnover in the cortical dendritic tree and altering synaptic plasticity and memory retention.
The Wildscreen Exchange is a dynamic new conservation initiative by the creators of Arkive. Using some of the best filmmakers and photographers on Earth, Wildscreen are creating films and photos that tell the stories of some the natural world’s most overlooked yet beautifully unique species and the amazing people who have dedicated their lives to help them. […]
What comes to mind when you think of the word “drones”? It’s usually not conservation. Increasingly, however drones are being used as vital tools for conservation. Drones can provide stunning images of landscapes and wildlife from formerly impossible locations. However, a lot of questions arise when you think about how to use drones for conservation. […] […]
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, Jun 26, 2015 More endangered pygmy sloths discovered in Panama than previously estimated Researchers estimate that there are between 500 – 1500 pygmy sloths residing on the Isla […] […]
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, Jun 19, 2015 Hawk-moths are capable of slowing their brains to stay in rhythm with their environment Hawk moths can slow parts of their brain in order to […]