TOP 100 CAMPING SITES
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| Species spillover: Broadening benefits of habitat corridors Animals are born to roam. So when they find themselves living on small patches of land surrounded by housing developments or cornfields, their movement is unnaturally confined. They may never find that other patch a mile down the road that is full of food, nesting grounds, even mates with differing genes (a very good thing for the health of a species.) What’s more, the plant seeds and pollen that naturally hitchhike with them are also stuck. [More] rss.sciam.com |
U.S. Energy Corridors Could Disrupt Climate Change Research On Tuesday, fourteen conservation groups and a Colorado county sued the federal government, alleging that it violated environmental, property and energy laws in designating "energy corridors" along 6,000 miles (9,650 kilometers) of public land and wilderness areas in the U.S. West. [More] rss.sciam.com |
The Origin of the Universe (preview) The universe is big in both space and time and, for much of humankind’s history, was beyond the reach of our instruments and our minds. That changed dramatically in the 20th century. The advances were driven equally by powerful ideas--from Einstein’s general relativity to modern theories of the elementary particles--and powerful instruments--from the 100- and 200-inch reflectors that George Ellery Hale built, which took us beyond our Milky Way galaxy, to the Hubble Space Telescope, which has taken us back to the birth of galaxies. Over the past 20 years the pace of progress has accelerated with the realization that dark matter is not made of ordinary atoms, the discovery of dark energy, and the dawning of bold ideas such as cosmic inflation and the multiverse.The universe of 100 years ago was simple: eternal, unchanging, consisting of a single galaxy, containing a few million visible stars. The picture today is more complete and much richer. The cosmos began 13.7 billion years ago with the big bang. A fraction of a second after the beginning, the universe was a hot, formless soup of the most elementary particles, quarks and leptons. As it expanded and cooled, layer on layer of structure developed: neutrons and protons, atomic nuclei, atoms, stars, galaxies, clusters of galaxies, and finally superclusters. The observable part of the universe is now inhabited by 100 billion galaxies, each containing 100 billion stars and probably a similar number of planets. Galaxies themselves are held together by the gravity of the mysterious dark matter. The universe continues to expand and indeed does so at an accelerating pace, driven by dark energy, an even more mysterious form of energy whose gravitational force repels rather than attracts. [More] rss.sciam.com |
Geoengineering wars: another scientist teases out surprising effect of global deforestation AUSTIN--A new and unpublished analysis of the regional impacts of a hypothetical scheme to mitigate global warming via radical deforestation was unveiled here Sunday at a gathering of science journalists and writers, on the heels of a blogging firestorm about geoengineering and climate change in anticipation of the release of S uperfreakonomics: Global Cooling, Patriotic Prostitutes, and Why Suicide Bombers Should Buy Life Insurance . [More] rss.sciam.com |
Velocity of Climate Change Varies from Mountain to Marsh Reports of maples on the march northward and butterflies flitting far afield are already flooding in, and climate scientists predict that with escalating temperature changes more species will need to either get out of dodge, or hope for emissions reductions that will help the planet dodge the climate bullet. [More] rss.sciam.com |