Traversing the High Sierra on the People’s Paths

Mile for mile, the John Muir Trail is one of the most scenic hikes on Earth. The footpath—never actually hiked by John Muir—starts in Ahwahnee (Yosemite Valley) and follows a series of lush meadows, granite lake basins, and high alpine mountain passes for over 200 miles (320 kilometers) along the spine of the […]

When it comes to airborne COVID-19 transmission, droplet size matters

The primary way that people catch COVID-19 is by being in close contact with an infected person. (Pixabay/) Researchers reported last week in the journal Physics of Fluids that tiny particles called aerosols probably don’t spread the virus that causes COVID-19 as effectively as larger droplets that fall quickly to the ground after being exhaled. […]

NUS researchers invent flexible and highly reliable sensor

IMAGE: Flexible TRACE sensor patches can be placed on the skin to measure blood flow in superficial arteries. view more  Credit: National University of Singapore Real-time health monitoring and sensing abilities of robots require soft electronics, but a challenge of using such materials lie in their reliability. Unlike rigid devices, being elastic and pliable makes their […]

Genomic data ‘catches corals in the act’ of speciation and adaptation

A) Porites lobata (yellow massive morphology) shown next to Porites compressa (blue-grey branching morphology) side by sidein the same habitat; (B) example of variation in bleaching susceptibility of P. compressa in Kāne’ohe Bay. Credit: Forsman, et al. (2020) A new study led by the University of Hawai’i at Mānoa’s Hawai’i Institute of Marine Biology (HIMB) […]

Drones are flying straight into volcanoes, for life-saving science

With an estimated 300 active volcanoes on Earth, the challenge is how to monitor them all to send out early warnings before they erupt. Measuring volcanic gas emissions is also no easy task. Now researchers have designed specially-adapted drones to help gather data from an active volcano in Papua New Guinea (PNG). The drones could […]

Location data to provide robust longer-term insights on flu outbreaks — ScienceDaily

Predicting influenza outbreaks just got a little easier, thanks to a new A.I.-powered forecasting tool developed by researchers at Stevens Institute of Technology. By incorporating location data, the A.I. system is able to outperform other state-of-the-art forecasting methods, delivering up to an 11% increase in accuracy and predicting influenza outbreaks up to 15 weeks in […]

A Precise Mosaic View of Mars’s South Pole

To get a precise view of a planet’s surface, scientists can build a mosaic using images captured by cameras mounted on an orbiting spacecraft. This process requires accounting for how the spacecraft and its camera were oriented when each photo was taken, as well as how that positioning corresponds to existing topographic data. […]

We’re getting better at treating COVID-19

Household transmission rates are higher than we thought. (Kelly Sikkema/) This year’s Halloween was made scarier by the rising COVID-19 infection rates across the country, and heading into the holiday season those numbers are only expected to rise. As similar surges in Europe are forcing many nations back into lockdown, the US is gearing up […]

Hungry plants rely on their associated bacteria to mobilize unavailable iron

IMAGE: In iron-limiting soils, plants activate an iron-deficiency response that includes production and secretion of coumarins. These compounds alter the composition of the root microbiota and elicit a microbial activity that… view more  Credit: Christopher J. Harbort In nature, healthy plants are awash with bacteria and other microbes, mostly deriving from the soil they grow in. […]

Race to save whales in Sri Lanka’s biggest mass stranding

The causes of mass strandings remain unknown Rescuers and volunteers were racing Monday to save about 100 pilot whales stranded on Sri Lanka’s western coast in the island nation’s biggest-ever mass beaching. The short-finned pilot whales began beaching at Panadura, 25 kilometres (15 miles) south of Colombo, shortly before dusk and within an hour their […]