Sci/tech

Exposure to Aircraft noise a continuing problem even with quieter engines
July 15, 2014 07:24 AM - EurActiv

Millions of urban Europeans are exposed to aviation noise that contributes to stress, high blood pressure and even weight gain, say health specialists who want stronger measures to make flying quieter. While new-generation jet engines are on average 75% quieter than than their 20th century predecessors, the advance in technology has been offset by a steady rise in flights and a demand for bigger passenger planes.

This is a extra special year for "Super Moons"
July 12, 2014 06:55 AM - Roger Greenway, ENN

Super Moons are full moons that are extra, well, super! They are super because they appear larger in the evening sky than your run of the mill full moon. In June of last year, a full Moon made headlines. The news media called it a "supermoon" because it was 14% bigger and 30% brighter than other full Moons of 2013. Around the world, people went outside to marvel at its luminosity. If you thought one supermoon was bright, how about three? The full Moons of summer 2014—July 12th, August 10th, and Sept. 9th--will all be supermoons. The scientific term for the phenomenon is "perigee moon." Full Moons vary in size because of the oval shape of the Moon's orbit. The Moon follows an elliptical path around Earth with one side ("perigee") about 50,000 km closer than the other ("apogee"). Full Moons that occur on the perigee side of the Moon's orbit seem extra big and bright.

Record Radiation in South America
July 11, 2014 09:00 AM - Winfield Winter, ENN

Astrobiologists from the United States and Germany recorded the highest known level of solar UV radiation to reach Earth's surface. This was around 10 years ago. On December 29, 2003, the UV Index (UVI) peaked, reaching the blistering number of 43.3 over the Andes Mountains in Bolivia. To put this in context, a beachgoer in the United States would expect a UVI of 8 or 9 on a summer day. Even with an 8 or a 9, one may not escape the day without sunburn. Nonetheless, it has taken scientists 10 years to detail a report of this data while taking into account all of the variables and anomalies monitored from an international network of dosimeters — or Eldonets (European Light Dosimeter Network) — that measure UV radiation worldwide. This system is comprised of more than 100 stations across 5 continents to account for variation in the atmosphere above each station.

New Study Quantifies Causes of the "Urban Heat Island" Effect
July 10, 2014 07:14 AM - Kevin Dennehy, Yale School of Forestry & Environmental Studies

A new Yale-led study quantifies for the first time the primary causes of the "urban heat island" (UHI) effect, a common phenomenon that makes the world's urban areas significantly warmer than surrounding countryside and may increase health risks for city residents. In an analysis of 65 cities across North America, researchers found that variation in how efficiently urban areas release heat back into the lower atmosphere — through the process of convection — is the dominant factor in the daytime UHI effect. This finding challenges a long-held belief that the phenomenon is driven principally by diminished evaporative cooling through the loss of vegetation.

Our newest Astronauts are fruit flies!
July 10, 2014 06:15 AM - Roger Greenway, ENN

Becoming an Astronaut is a big deal! Men and women selected to go into space are very carefully chosen. They go through rigorous medical evaluations to make sure they are healthy and that their bodies can withstand the forces of liftoff and re-entry. And they go through months and months of training to prepare them for their first space flight. Now NASA is sending untested, untrained astronauts into space. Of course, they are not human, they are fruit flies! Fruit flies are bug eyed and spindly, they love rotten bananas, and, following orders from their pin-sized brains, they can lay hundreds of eggs every day. We have a lot in common. Genetically speaking, people and fruit flies are surprisingly alike, explains biologist Sharmila Bhattacharya of NASA's Ames Research Center. "About 77% of known human disease genes have a recognizable match in the genetic code of fruit flies, and 50% of fly protein sequences have mammalian analogues."

Cell Phone Conservation
July 9, 2014 10:35 AM - Alex Kirby, The Ecologist

Some of the world's most endangered forests may soon benefit from better protection, thanks to discarded treasures from the consumer society - mobile phones. A Californian technology startup, Rainforest Connection (RFCx), has developed a tool - made from recycled smartphones - that it says will pilot new ways to monitor and stop illegal logging and animal poaching throughout Africa's equatorial forests. RFCx has formed a partnership with the Zoological Society of London (ZSL), an international scientific charity that works for the worldwide conservation of animals and their habitats. The two organisations are planning to install the anti-deforestation, anti-poaching technology in Cameroon this year.

Vast reservoir of gas may fuel star creation in our galaxy
July 9, 2014 08:14 AM - Ken Croswell, Science

The Milky Way may have found a solution to its gas shortage. Astronomers had calculated that our home galaxy possesses only enough fuel to forge new stars for just a few billion more years. But scientists have now discovered that a long stream of gas falling into the Milky Way is four times as massive as previously thought and could power our galaxy's starmaking career for a long time to come. "It's a very beautiful study with surprising results," says Leo Blitz of the University of California, Berkeley, an astronomer who was not part of the project.

SAR11 and Methane
July 8, 2014 08:07 AM - Allison Winter, ENN

With the focus on reducing carbon emissions, we often forget about methane — another greenhouse gas that is way more powerful as an atmospheric pollutant than carbon dioxide. Methane emissions can come from industry, agriculture, and waste management activities, but can also be emitted from a number of natural sources. One newly discovered natural source: SAR11.

Frackable rock under groundwater aquifers raise water contamination fears
July 3, 2014 02:20 PM - Editor, The Ecologist

A study by the British Geological Survey and the Environment Agency reveals that almost all the the oil and gas bearing shales in England and Wales underlie drinking water aquifers, raising fears that widespread water contamination could occur. The British Geological Survey (BGS) in partnership with The Environment Agency (EA) have published a map which show the depth to each shale gas and oil source rock below principal groundwater aquifers in England and Wales.

What are comets?
July 3, 2014 06:32 AM - Roger Greenway, ENN

Scientists have speculated for centuries about comets. Why do the become visible on an irregular interval? Why does the tail always point away from our sun? What are comets made of? Are they balls of ice, or more like an asteroid? Now NASA may finally get some concrete answers with a current mission that will land on a comet later this year! Comet 67P/Churyumov-Gerasimenko is releasing the Earthly equivalent of two glasses of water into space every second. The observations were made by the Microwave Instrument for Rosetta Orbiter (MIRO), aboard the European Space Agency's Rosetta spacecraft on June 6, 2014. The detection of water vapor has implications not only for cometary science, but also for mission planning, as the Rosetta team prepares the spacecraft to become the first ever to orbit a comet (planned for August), and the first to deploy a lander to its surface (planned for November 11).

First | Previous | 1 | 2 | 3 | 4 | Next | Last