Why do whales beach?

Video highlights from Nature's Weirdest Events

In the largest stranding ever, 337 whales have beached off the coast of Chile

During an observation flight over Chile, scientists have made a horrifying discovery – 337 whales beached on a remote area of Patagonia.

Back in 2009, almost 200 whales were beached on the shores of King Island in Tasmania. Wildlife rescuers and local residents worked tirelessly to keep the whales cool and return them to the sea.

But why did they beach in the first place? Are humans to blame?

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