Enn Original News
Low Zika risk for travelers to Olympics in Brazil, study finds
July 26, 2016 07:23 AM - Michael Greenwood, Yale News
The Zika virus poses a negligible health threat to the international community during the summer Olympic Games that begin next month in Rio de Janeiro, Brazil, according to researchers at Yale School of Public Health (YSPH).
In a worst-case scenario, an estimated 3 to 37 of the thousands of athletes, spectators, media, and vendors traveling to Rio for the Olympics will bring the Zika virus back to their home countries, the researchers concluded.
Why Americans waste so much food
July 22, 2016 06:51 AM - Martha Filipic, Ohio State University
Even though American consumers throw away about 80 billion pounds of food a year, only about half are aware that food waste is a problem. Even more, researchers have identified that most people perceive benefits to throwing food away, some of which have limited basis in fact.
A study published today in PLOS ONE is just the second peer-reviewed large-scale consumer survey about food waste and is the first in the U.S. to identify patterns regarding how Americans form attitudes on food waste.
Putting the sloth in sloths
July 21, 2016 07:19 AM - Terry Devitt, University of Wisconsin-Madison
Although most of the terrestrial world is covered in trees, there are precious few vertebrates that make the canopy their home and subsist solely on a diet of leaves.
Tree sloths are among the most emblematic tree-dwelling mammals. However, they are best known for their pokey demeanor rather than the fact that they spend the majority of their lives in trees munching leaves. But the slow motion lifestyle of tree sloths, according to a new study, is the direct result of the animal’s adaption to its arboreal niche.
“Among vertebrates, this is the rarest of lifestyles,” says Jonathan Pauli, a University of Wisconsin—Madison professor of forest and wildlife ecology and the senior author of a report to appear in the August 2016 edition of the American Naturalist. “When you picture animals that live off plant leaves, they are almost all big — things like moose, elk and deer. What’s super interesting about arboreal folivores is that they can’t be big.”
Regulating particulate pollution
July 12, 2016 07:16 AM - Nancy W. Stauffer, MIT Energy Initiative
An MIT analysis of how best to reduce fine particulate matter in the atmosphere has brought some surprising results. Due to past regulations, levels of key emissions that form those harmful particles are now lower than they were a decade ago, causing some experts to suggest that cutting them further might have little effect. Not true, concludes the MIT study. Using an atmospheric model, the researchers found that new policies to restrict the same emissions would be even more effective now than they were in the past. Further analysis elucidated the chemical processes — some unexpected — that explain their findings. Their results demonstrate the importance of tailoring air pollution policies to specific situations and of addressing a variety of emissions in a coordinated way.
New technology could improve use of small-scale hydropower in developing nations
July 1, 2016 07:10 AM - Oregon State University via EurekAlert!
Engineers at Oregon State University have created a new computer modeling package that people anywhere in the world could use to assess the potential of a stream for small-scale, “run of river” hydropower, an option to produce electricity that’s of special importance in the developing world.
The system is easy to use; does not require data that is often unavailable in foreign countries or remote locations; and can consider hydropower potential not only now, but in the future as projected changes in climate and stream runoff occur.
2 ways to limit the number of heat-related deaths from climate change
June 23, 2016 07:16 AM - Columbia University Mailman School of Public Health via EurekAlert!
By the 2080s, as many as 3,331 people could die every year from exposure to heat during the summer months in New York City. The high estimate by Columbia University scientists is based on a new model--the first to account for variability in future population size, greenhouse gas trajectories, and the extent to which residents adapt to heat through interventions like air conditioning and public cooling centers. Results appear online in the journal Environmental Health Perspectives.
Threats to habitat connectivity as sea waters inundate coastal areas
June 21, 2016 07:05 AM - Jim Melvin, Clemson University
By the year 2100, sea levels might rise as much as 2.5 meters above their current levels, which would seriously threaten coastal cities and other low-lying areas. In turn, this would force animals to migrate farther inland in search of higher ground. But accelerated urbanization, such as the rapidly expanding Piedmont area that stretches from Atlanta to eastern North Carolina, could cut off their escape routes and create climate-induced extinctions.
Where and when were dogs first domesticated?
June 3, 2016 10:31 AM - Oxford University
Supported by funding from the European Research Council and the Natural Environment Research Council, a large international team of scientists compared genetic data with existing archaeological evidence and show that man’s best friend may have emerged independently from two separate (possibly now extinct) wolf populations that lived on opposite sides of the Eurasian continent. This means that dogs may have been domesticated not once, as widely believed, but twice.
A major international research project on dog domestication, led by the University of Oxford, has reconstructed the evolutionary history of dogs by first sequencing the genome (at Trinity College Dublin) of a 4,800-year old medium-sized dog from bone excavated at the Neolithic Passage Tomb of Newgrange, Ireland. The team (including French researchers based in Lyon and at the National Museum of Natural History in Paris) also obtained mitochondrial DNA from 59 ancient dogs living between 14,000 to 3,000 years ago and then compared them with the genetic signatures of more than 2,500 previously studied modern dogs.
How did the giraffe get its long neck?
May 27, 2016 06:09 AM - Penn State University
For the first time, the genomes of the giraffe and its closest living relative, the reclusive okapi of the African rainforest, have been sequenced — revealing the first clues about the genetic changes that led to the evolution of the giraffe’s exceptionally long neck and its record-holding ranking as the world’s tallest land species. The research will be published in the scientific journal Nature Communications on May 17, 2016.
“The giraffe’s stature, dominated by its long neck and legs and an overall height that can reach 19 feet (~ 6 m), is an extraordinary feat of evolution that has inspired awe and wonder for at least 8,000 years — as far back as the famous rock carvings at Dabous in the Republic of Niger,” said Douglas Cavener of Penn State, who led the research team with Morris Agaba of the Nelson Mandela African Institute for Science and Technology in Tanzania.
How did the giraffe get its long neck? Clues now are revealed by new genome sequencing.
Spring comes sooner to urban heat islands, with potential consequences for wildlife
May 25, 2016 08:21 PM - Jenny Seifert, University of Wisconsin-Madison
With spring now fully sprung, a new study by University of Wisconsin–Madison researchers shows that buds burst earlier in dense urban areas than in their suburban and rural surroundings. This may be music to urban gardeners’ ears, but that tune could be alarming to some native and migratory birds and bugs.