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103 articles from PhysOrg

Study suggests aggressive carbon taxation could help US meet targets in Paris agreement

Nearly all the countries of the world ratified the Paris Agreement in 2016. The accord aims to limit the increase of the world's temperature to less than 2 degrees Celsius above pre-industrial temperatures. To do this, global greenhouse gas emissions would have to decrease roughly 25% below 2010 levels by 2030 and reach almost zero by 2070. As one of the largest emitters of greenhouse gases, the...

NASA-NOAA satellite sees Amphan's eye obscured

Early on May 18, 2020, Tropical Cyclone Amphan was a Category 5 storm in the Northern Indian Ocean. On May 19, satellite data from NASA-NOAA's Suomi NPP satellite revealed that the storm has weakened and the eye was covered by high clouds.

Ribs evolved for movement first, then co-opted for breathing

When early tetrapods transitioned from water to land the way they breathed air underwent an evolutionary revolution. Fish use muscles in their head to pump water over their gills. The first land animals utilized a similar technique—modern frogs still use their head and throat to force air into their lungs. Then another major transformation in vertebrate evolution took place that shifted...

Galactic cosmic rays now available for study on Earth, thanks to NASA

To better understand and mitigate the health risks faced by astronauts from exposure to space radiation, we ideally need to be able to test the effects of Galactic Cosmic Rays (GCRs) here on Earth under laboratory conditions. An article publishing on May 19, 2020 in the open access journal PLOS Biology from Lisa Simonsen and colleagues at the NASA Langley Research Center, USA, describes how NASA...

Ecosystem diversity drives the origin of new shark and ray species

What drives the evolution of new species of sharks and rays? Traditionally, scientists thought it required species to be separated by geographic or spatial barriers, however a new study of elasmobranchs (the group of sharks and rays) has challenged this expectation—and found evolution is happening faster than many think.

Hunting for the next generation of conservation stewards

Millions of acres of natural habitat in the U.S. and the wildlife that inhabit these large swaths of private and public lands depend on people who support a myriad of conservation activities. Recreational hunters are an important group of people whose licenses, taxes and fees directly pay for conservation efforts. However, the number of people who hunt as a sport has steadily declined since the...

Twins study sheds light on trust

New research from the University of Aberdeen and the University of Western Australia has looked at the basis of trust and what makes some of us trust more readily than others.

Study shows vulnerable populations with less education more likely to believe, share misinformation

As the COVID-19 pandemic threatens public health around the world, misinformation regarding its treatment, causes and cures has abounded. A University of Kansas study has found that vulnerable populations, often those most severely affected by such crises, are also at a high risk of consuming and sharing such misinformation online, while also struggling to assess information's credibility.

How does an increase in nitrogen application affect grasslands?

The "PaNDiv" experiment, established by researchers of the University of Bern on a 3000 m2 field site, is the largest biodiversity-ecosystem functioning experiment in Switzerland and aims to better understand how increases in nitrogen affect grasslands. The first article from this experiment has just been published in the scientific journal Functional Ecology after more than four years of work.

A 300,000-year-old, nearly complete elephant skeleton from Schöningen

Elephants ranged over Schöningen in Lower Saxony 300,000 years ago. In recent years, remains of at least ten elephants have been found at the Palaeolithic sites situated on the edges of the former opencast lignite mine. Now, archaeologists from the Senckenberg Centre for Human Evolution and Palaeoenvironment at the University of Tübingen, in cooperation with the Lower Saxony State Office for...