ScienceDaily: Most Popular News |
- Trees save lives, reduce respiratory problems
- Primary texting bans associated with lower traffic fatalities, study finds
- Slow walking speed, memory complaints can predict dementia
- New mass map of distant galaxy cluster is most precise yet
| Trees save lives, reduce respiratory problems Posted: 25 Jul 2014 01:35 PM PDT In the first broad-scale estimate of air pollution removal by trees nationwide, scientists have calculated that trees are saving more than 850 human lives a year and preventing 670,000 incidences of acute respiratory symptoms. The study considered four pollutants for which the U.S. EPA has established air quality standards: nitrogen dioxide, ozone, sulfur dioxide, and particulate matter less than 2.5 microns (PM2.5) in aerodynamic diameter.  |
| Primary texting bans associated with lower traffic fatalities, study finds Posted: 25 Jul 2014 11:44 AM PDT States that allow officers to pull over a driver for texting while driving saw fewer deaths than those that use secondary enforcement of texting bans. Some states have banned all drivers from texting while driving, while others have banned only young drivers. Also, some states' texting bans entail secondary enforcement, meaning an officer must have another reason to stop a vehicle, like speeding or running a red light, before citing a driver for texting while driving. These differences appear to impact traffic deaths, this study concludes.  |
| Slow walking speed, memory complaints can predict dementia Posted: 25 Jul 2014 11:44 AM PDT A study involving nearly 27,000 older adults on five continents found that nearly 1 in 10 met criteria for pre-dementia based on a simple test that measures how fast people walk and whether they have cognitive complaints. People who tested positive for pre-dementia were twice as likely as others to develop dementia within 12 years.  |
| New mass map of distant galaxy cluster is most precise yet Posted: 24 Jul 2014 07:42 AM PDT Astronomers have mapped the mass within a galaxy cluster more precisely than ever before. Created using observations from Hubble's Frontier Fields observing program, the map shows the amount and distribution of mass within MCS J0416.1-2403, a massive galaxy cluster found to be 160 trillion times the mass of the Sun.  |
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