Earth Changes
Global warming skeptics have been compared with holocaust deniers, and media reports routinely present the issue as "settled." Those opposed to the global warming agenda are being openly mocked and attacked - but they are being mocked and attacked based on a straw-man misrepresentation of their position.
It's a case of "When in Rome, do as the Romans do," says biologist Joseph Nocera, who conducted the research while working as an NSERC Postdoctoral Fellow at Queen's under the supervision of Biology professor Laurene Ratcliffe.
Avoiding predators can substantially increase a bird's chances of survival during migration, notes Dr. Nocera. But to do that, it first has to recognize who its predators are. "We believe some prey use social cues from other animals to gain information about potential predators," he says.
Findings from the study are published on-line in the current issue of the journal Behavioral Ecology and Sociobiology.
The unusual defense mechanism is described by Harvard's David C. Blackburn, James Hanken, and Farish A. Jenkins, Jr., in a forthcoming issue of the journal Biology Letters.
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©David C. Blackburn |
Close-up of the foot of a living Trichobatrachus robustus showing the white bony claws protruding from the tips of the toes. |
"It's surprising enough to find a frog with claws," says Blackburn, a doctoral student in Harvard's Department of Organismic and Evolutionary Biology. "The fact that those claws work by cutting through the skin of the frogs' feet is even more astonishing. These are the only vertebrate claws known to pierce their way to functionality."
The species that cannot migrate fast enough to higher altitudes or cooler coastal areas could face extinction because of greenhouse gas emissions that are heating the planet, according to researchers.
While the divers have only found bodies so far, officials were not willing to give up hope of finding more survivors among the more than 800 people missing since the seven-story ferry listed and went down in a half-hour or less Saturday.
"There is a slim chance that we can still find survivors" insided the ferry, coast guard Lt. Cmdr Rogelio Villanueva said. "As the days pass, indeed the chance is getting slimmer."
An enormous cloud of Saharan dust stretching from the African coast to the Gulf of Mexico will begin moving through the Dallas-Fort Worth area today and could blanket much of North Texas off and on through next week, said Bryan Lambeth, senior meteorologist at the Texas Commission on Environmental Quality.
Only National Guard soldiers and firefighters in life vests are allowed to stack sandbags, because volunteers and heavy equipment could sink. A single muskrat recently created a geyser of riverwater by digging into the berm.
Cloud-seeding, you may be thinking, went out of fashion decades ago, perhaps in 1969 when the hippies swore that it was CIA scientists fiddling with nature who caused the downpours at the Woodstock music festival. Not so. In fact, it seems to be more in vogue than ever, in California and elsewhere.
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©The Independent |
Comment: The dangers of climate change are real, but the standard global warming scenario as explained in the vast majority of media outlets leaves something to de desired. Read some comments on one of the most prominent of the global warming "demonologists" here:
Global Warming Demonology