Captain Cook's detailed 1778 records confirm warming today in the Arctic

More than two centuries ago, Cook was blocked in his search for a Northwest Passage by a wall of ice. Today scientists are mining his meticulous records for a new perspective on the warming that has opened the Arctic in ways he could never have imagined.

Narwhals, tusked whales of the Arctic, see with sound. Really well.

Researchers found that narwhals can use clicks, like a flashlight switching on and off, to receive narrow snapshots which they reconstruct into a larger acoustic picture with more resolution than any other animal—except maybe beluga whales.

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