Have you ever anticipated an earthquake? Some people report that they have "sensed" a temblor before it struck. They may claim to have felt a "foreboding" that something was going to happen. When an earthquake then strikes, it is easy to retrospectively join the dots and attribute that vague sense of impending doom to the quake.
In some animals, however, there seems to be a genuine ability to sense the changes that occur before earthquakes.
Perhaps the first person to record this was the Greek historian Thucydides, in 373 B.C. Days before a massive earthquake hit the city of Helice, he says all manner of animals streamed out. Dogs, rats and weasels, they ran for the hills. (Snakes sensed the coming catastrophe too, and they slithered for the highlands.)
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