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A new study finds that chronic cannabis use -- whether it's smoked or consumed in edible form -- is associated with significant cardiovascular risks.
Involving communities in nature-based solutions to climate challenges leads to greater innovation, study shows (link is external)
Involving communities in nature-based solutions to tackle urban climate and environmental challenges leads to innovation and multiple benefits, a study shows.
Even birds can't outfly climate change (link is external)
As rising global temperatures alter ecosystems worldwide, animal species usually have two choices: adapt to changing local conditions or flee to a cooler clime. Ecologists have long assumed that the world's bird species were best equipped to respond to the pressures of climate change simply because they have the option of flying to higher altitudes or towards global poles. But a new study finds that few bird species are able to escape the realities of a warming world.
Electric buses struggle in the cold, researchers find (link is external)
Researchers have released new insights on a pilot program involving all-electric buses in Ithaca, NY, USA -- with implications for cities, schools and other groups that are considering the electrification of their fleets, as well as operators, policymakers and manufacturers.
Zika virus uses cells' 'self-care' system to turn against host (link is external)
A new study reveals the biological secret to the Zika virus's infectious success: Zika uses host cells' own 'self-care' system of clearing away useless molecules to suppress the host proteins that the virus has employed to get into those cells in the first place.
New study analyzes air quality impacts of wildfire smoke (link is external)
With wildfires increasing in frequency, severity, and size in the Western U.S., researchers are determined to better understand how smoke impacts air quality, public health, and even the weather. As fires burn, they release enormous amounts of aerosols -- the vaporized remains of burning trees and homes that enter the atmosphere and the air we breathe. Now, a new study dissects these aerosols and gases to pinpoint their potential effects on our health as well as the planet's short and long-term weather.
Cryogenic hydrogen storage and delivery system for next-generation aircraft (link is external)
Researchers have designed a liquid hydrogen storage and delivery system that could help make zero-emission aviation a reality. Their work outlines a scalable, integrated system that addresses several engineering challenges at once by enabling hydrogen to be used as a clean fuel and also as a built-in cooling medium for critical power systems aboard electric-powered aircraft.
Just add iron: Researchers develop a clever way to remove forever chemicals from water (link is external)
Researchers find that iron powder, an inexpensive alternative to activated carbon, does a better job at filtering PFOS from water -- it's 26 times more effective.
How does digestion affect molecular analysis of owl pellets? (link is external)
Researchers found that digestion in hawks and owls can alter the results of isotopic analysis in pellets and droppings.
Rapid simulations of toxic particles could aid air pollution fight (link is external)
A pioneering method to simulate how microscopic particles move through the air could boost efforts to combat air pollution, a study suggests.
Cryo-em freezes the funk: How scientists visualized a pungent protein (link is external)
Most people have witnessed -- or rather smelled -- when a protein enzyme called sulfite reductase works its magic. This enzyme catalyzes the chemical reduction of sulfite to hydrogen sulfide. Hydrogen sulfide is the rotten egg smell that can occur when organic matter decays and is frequently associated with sewage treatment facilities and landfills. But scientists have not been able to capture a visual image of the enzyme's structure until now, thus limiting their full understanding of how it works.
Home water-use app improves water conservation (link is external)
A new study has found that a smartphone app that tracks household water use and alerts users to leaks or excessive consumption offers a promising tool for helping California water agencies meet state-mandated conservation goals. The study found that use of the app -- called Dropcountr -- reduced average household water use by 6%, with even greater savings among the highest water users.
Nordic studies show the significance of old-growth forests for biodiversity (link is external)
Researchers conducted a systematic review of 99 scientific publications that compared the flora or fauna of old-growth forests, managed forests and clearcut sites in boreal Europe. The reviewed studies showed large differences in the species communities inhabiting these forest types. The species richness of full-canopy forests increases as the forest gets older. Clearcut sites are also species-rich, but they are inhabited by a distinct set of species in comparison to full-canopy forests.
Without public trust, effective climate policy is impossible (link is external)
When formulating climate policy, too little attention is paid to social factors and too much to technological breakthroughs and economic reasons. Because citizens are hardly heard in this process, European governments risk losing public support at a crucial moment in the climate debate.
The ocean seems to be getting darker (link is external)
Scientists, who have spent more than a decade examining the impact of artificial light at night on the world's coasts and oceans, have shown that more than one-fifth of the global ocean -- an area spanning more than 75 million sq km -- has been the subject of ocean darkening over the past two decades. Ocean darkening occurs when changes in the optical properties of the ocean reduce the depth of its photic zones, home to 90% of all marine life and places where sunlight and moonlight drive ecological interactions.
Stirling research could extend biopesticide effectiveness (link is external)
Alterations to the diet of pests could impact how quickly they can adapt to biopesticides.
Discovery offers new insights into skin healing in salmon (link is external)
Scientists have discovered cells in the skin of Atlantic salmon that offer new insights into how wounds heal, tissues regenerate, and cellular transitions support long-term skin health.
HIV vaccine study uncovers powerful new antibody target (link is external)
In the long battle to create an effective HIV vaccine, scientists have made a major leap forward. A new study shows that a series of vaccines can coax the immune system to produce powerful antibodies capable of blocking a wide range of HIV strains -- including those that are typically the hardest to stop.
Oldest whale bone tools discovered (link is external)
Humans were making tools from whale bones as far back as 20,000 years ago, according to a new study. This discovery broadens our understanding of early human use of whale remains and offers valuable insight into the marine ecology of the time.
Megalodon: The broad diet of the megatooth shark (link is external)
Contrary to widespread assumptions, the largest shark that ever lived -- Otodus megalodon -- fed on marine creatures at various levels of the food pyramid and not just the top. Scientists analyzed the zinc content of a large sample of fossilized megalodon teeth, which had been unearthed above all in Sigmaringen and Passau, and compared them with fossil teeth found elsewhere and the teeth of animals that inhabit our planet today.
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