14 de janeiro de 2012

Frogs can Predict Earthquackes


If by any chance in your life you had the fortune to come across with some FROGS don't look at it has a stressful thing. In fact, FROGS can be quite helpfull, according to a study made by the Biologist Rachel Grant, from the Open University of the UK, once they have the rare potential of predicting earthquackes and warning you of the danger, long before you are even aware of the trembling thing.

Grant, on a researche trip to Italy, in 2009, found that, days before the occurrence of an earthquake, an entire colony of frogs uncharacteristically left their mating grounds.
She published her data in the Journal of Zoology, describing the dramatic change 3 days prior to the occurrence of an earthquake. In that timespan the colony shrank rapidly from 96 to zero. According to Grant:

“Our study is one of the first to document animal behaviour before, during and after an earthquake. Our findings suggest that toads are able to detect pre-seismic cues such as the release of gases and charged particles, and use these as a form of earthquake early warning system,” says lead author Dr Rachel Grant.

What does it all mean? The ability of animals to early-detect natural disasters such as earthquakes is not only interesting but obviously also potentially very useful. After publishing her article Grant was contacted by a team of researchers at NASA led by Dr. Friedemann Freund who was investigating the chemical changes that occur when rocks in the earth’s crust are under extreme pressure. The research team conducted laboratory experiments which concluded that the frogs can detect chemical alterations in underground water caused by bedrock under intense pressure. This pressure stems from movements of tectonic plates, which produce earthquakes. These pre-quake changes are extremely difficult to detect but lead to changes that animals such as frogs are very sensitive to. from here

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