TOP 100 CAMPING SITES
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| Does Military Sonar Kill Marine Wildlife? Dear EarthTalk: Is it true that military sonar exercises actually kill marine wildlife? -- John Slocum, Newport, RI [More] rss.sciam.com |
Most restrictive turtle-harvesting ban in the U.S. enacted in Florida Florida has banned commercial harvesting of all freshwater turtles within the state. The ban, which took effect on Monday, is described as the most restrictive in the nation by the Florida's Fish and Wildlife Conservation Commission. [More] rss.sciam.com |
World's largest bat being hunted into extinction With a wingspan of more than 1.5 meters), the large flying fox ( Pteropus vampyrus ) is the world's largest bat. But that size hasn't helped it. In fact, the giant fruit bat has become a target for hunting, and so many of them are being killed every year that the species now faces possible extinction, according to a new study. [More] rss.sciam.com |
The Color of Sin--Why the Good Guys Wear White When the Chrysler car company released a new model of its Dodge Coronet in 1967, the theme of its advertising campaign was the “White Hat Special.” Some of the ads featured cartoon cowboys riding around “keepin’ the prices low,” whereas others had the ubiquitous “Dodge Girl” in her signature white Stetson, chirping: “Only the good guys could put together a deal like this.”These ads did not need any elaboration. Madison Avenue knew that potential buyers had all been raised on film and TV Westerns and were familiar with the symbolism of white hats. Roy Rogers, Gene Autry, the Lone Ranger--these cinematic heroes wore white hats, and bad guys wore black. It was all very simple. [More] rss.sciam.com |
Better Mileage Now--Improving the Combustion Engine (preview) Demand for automobiles is rising worldwide. So is concern about greenhouse gas emissions. In response, scientists and engineers are working diligently to perfect new power plants for future vehicles, including battery and hydrogen fuel-cell electric cars. Although these and other alternatives show great promise for the long term, perhaps the single greatest way to reduce fossil-fuel consumption in the near term is to further improve today’s dominant transportation power plant: the gasoline internal-combustion (IC) engine.Fortunately, efficiency can be raised in a number of ways, notably, better control over the air-fuel mixture entering the combustion chamber, over the way gasoline is ignited there, and over the mechanical systems that harness that energy. These can improve traditional automobiles as well as gasoline-electric hybrid models. [More] rss.sciam.com |