Are you afraid of earthquakes? Buy a frog! New research show that animals sense chemical changes in groundwater that occur when an earthquake is about to strike.Animals that live in or near groundwater are highly sensitive to any changes in its chemistry, so they might sense this days before the rocks finally "slip" and cause a quake. This is what happened in L'Aquila, Italy, in 2009 - when a colony of toads abandoned its pond days before a quake.
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