US oil and natural gas production, has been boosted in recent years by a drilling process known as hydraulic fracturing, commonly called “fracking.”
But this practice has also been criticized for its possible impact on the environment because of the wastewater this method generates.
A new study published in the American Chemical Society’s Environmental Science and Technology, which examined solid well waste from Marcellus shale in Pennsylvania, finds that the waste contains naturally occurring radioactive material that had not been previously reported.
In addition to the early reports of uranium 238 and radium 226, the study indicates that collected waste samples also contain elevated levels of the radioactive isotopes uranium-234, thorium-230, lead-210 and polonium-210.
Uranium-238 and radium-226 have been reported in previous such samples.
The Atacama Large Millimeter/submillimeter Array or ALMA, in Chile, is a collection of some 66 radio telescope antennas that work together to provide astronomers to study some of the earliest and most distant galaxies in the Universe.
Regions of space where these objects are located tend to be cold and dark and are difficult if not impossible to detect in visible light wavelengths.
But these features can be seen clearly and brightly when they are observed in the millimeter and submillimeter wavelengths of the electromagnetic spectrum.
Now, ALMA has received an upgrade with the installation of new Band 5 receivers to a select set of the array’s antennas.
Band 5 refers a receiving range of frequencies that can vary from 582 to 806 megahertz.
These devices will make its observations in a whole new section of the radio spectrum and among other things will provide astronomers with a better way to look for signs of water in the nearby Universe.
Scientists have discovered a new ancient bird species that lived in the Canadian arctic some 90 million years ago during Cretaceous period.
They say that fossils leading to the discovery are among the oldest avian fossils that have been found in the northernmost latitudes.
The scientists describe this new ancient bird species as a cross between a large seagull and another diving bird species like cormorants.
They add that this creature probably had teeth as well.
The new fossils along with those gathered in the same area in the past suggest that the birds made their home near a peaceful freshwater bay, which was also home to turtles, large freshwater fish, and a now extinct crocodile-like reptiles called champsosaurs.
The scientists describe the climate in the Canadian arctic, some 90 to 84 million years ago, as being similar to northern Florida today – that is, warm through much of the year.
The Earth’s core, which lies nearly 3,000 kilometers below the surface, is made of two layers.
At the very center of the Earth is the inner core, which scientists say is a solid sphere made of an iron-nickel alloy. Surrounding the inner core is the outer core of which is made of molten iron and nickel that’s believed to be between 4000-5000º Celsius.
New data gathered by the European Space Agency’s three satellite Swarm network is providing scientists with an x-ray view of the Earth’s core.
This information has led to the discovery of a jet stream flowing within the molten outer core.
Like the jet stream of air currents in the atmosphere, scientists explain that this jet stream in the outer core is a moving belt of molten material circling its magnetic North Pole and is traveling at a speed of about 40 kilometers per year.
Researchers who made the discovery say this jet stream lines-up with a boundary between two regions within the core.
A new study by Finnish researchers, and published in the journal Age and Aging, suggests taking frequent sauna baths can reduce the risk of dementia, such as Alzheimer’s disease.
Scientists from the University of Eastern Finland followed 2,000 middle-age men for twenty years as part of its ongoing Kuopio Ischemic Heart Disease Risk Factor Study (KIHD).
They found that participants who took sauna baths between 4 to 7 times per week were 66% less likely of being diagnosed with dementia than those doing so once a week.
An earlier report from the continuing study indicated that frequent sauna bathing also considerably decreases the risk of sudden cardiac death, the risk of death due to coronary artery disease and other cardiac events, as well as overall mortality.
According to the paper’s authors the association between sauna bathing and the risk of dementia had not been studied until recently.