718,219 articles

The do's and don'ts of monitoring many wildlife species at once

A new analysis of 92 studies from 27 countries conducted by ecologists suggests that many recent multi-species studies of wildlife communities often incorrectly use the analytical tools and methods available. Technology such as trail cameras and drones have 'revolutionized wildlife monitoring studies' in recent years, says organismic and evolutionary biologists 'but if not properly used in...

Smithsonian opens up 2.8 million images to the public

The Smithsonian Institution is releasing a whopping 2.8 million high-res, two- and three-dimensional images from its collections to a new Open Access online platform. The material comes from all 19 Smithsonian museums, nine research centers, libraries, archives and the National Zoo, and it's available for free to anyone with a web...

Instrument may enable mail-in testing to detect heavy metals in water

Lead, arsenic, and other heavy metals are increasingly present in water systems around the world due to human activities, such as pesticide use and, more recently, the inadequate disposal of electronic waste. Chronic exposure to even trace levels of these contaminants, at concentrations of parts per billion, can cause debilitating health conditions in pregnant women, children, and other vulnerable...

How sleep helps teens deal with social stress

Study found that adequate sleep allowed students to cope with discrimination and challenges associated with ethnic or racial bias. It also helps them problem-solve more effectively and seek peer support when faced with hardships.

Coronavirus could cause 'severe disruption' in America, CDC says

CDC head of immunization says she expects the virus to spread in the US between communities – ‘It’s not a question of if but when’The US Center for Disease Control and Prevention (CDC) has warned that the coronavirus outbreak could cause “severe disruption” to the lives of ordinary Americans, and urged families and communities to start making preparations.The extent of the spread of...

The Guardian view on the new coronavirus: buying time can save lives | Editorial

Many experts believe this outbreak will soon be declared a pandemic. Even if it is not containable, it can still be slowedIt now appears almost inevitable that the new coronavirus outbreak will soon be identified as a global pandemic. There has been a surge in cases in Iran, South Korea and Italy, and incidents confirmed in numerous countries, in addition to the almost 80,000 cases seen in China....

Insulin signaling suppressed by decoys

In a discovery that may further the understanding of diabetes and human longevity, scientists at Scripps Research have found a new biological mechanism of insulin signaling. Their study, involving the roundworm C. elegans, reveals that a "decoy" receptor is at work in binding to insulin molecules and keeping them from sending signals for increased insulin production.

Shrinking sea ice is creating an ecological trap for polar bears

San Diego Zoo Global researchers studying the effects of climate change on polar bears are using innovative technologies to understand why polar bears in the Southern Beaufort Sea are showing divergent movement patterns in the summer. In recent decades, about a quarter of this population of bears have chosen to come on land instead of staying on the shrinking summer sea ice platform. Historically,...

From China to the South Pole: Joining forces to solve the neutrino mass puzzle

Among the most exciting challenges in modern physics is the identification of the neutrino mass ordering. Physicists from the Cluster of Excellence PRISMA+ at Johannes Gutenberg University Mainz (JGU) play a leading role in a new study that indicates that the puzzle of neutrino mass ordering may finally be solved in the next few years. This will be thanks to the combined performance of two new...

A better starting point for exploring entanglement

Quantum entanglement is perhaps one of the most intriguing phenomena known to physics. It describes how the fates of multiple particles can become entwined, even when separated by vast distances. Importantly, the probability distributions needed to define the quantum states of these particles deviate from the bell-shaped, or 'Gaussian' curves which underly many natural processes. Non-Gaussian...

Stimulating resonance with two very different forces

Widely studied in many different fields, 'nonlinear' systems can display excessively dramatic responses when the forces which cause them to vibrate are changed. Some of these systems are sensitive to changes in the very parameters which define their driving forces, and can be well described using mathematical equations. These 'parametric' oscillators have been widely researched in the past, but so...

Powerful mantis shrimp pull punches in air for self-preservation

Mantis shrimp (Squilla mantis) don't take kindly to captivity. "They have a general baseline of being angry," chuckles Kate Feller, currently at the University of Minnesota, USA, recalling how the contrary stomatopods are particularly keen to lash out when exposed to air. "I had developed a means of holding mantis shrimp with their striking appendages out of water while their gills [arranged...