“Then, all of a sudden, two humpback whales just turn up,” says Gregory. “They do this amazing trumpeting noise [that’s] so loud, it reverberates in the hull of the boat, like an elephant ...

Alisa Schulman-Janiger was observing gray whales off Mexico in 1985 when, instead of a majestic fluke rising from the water, she saw an ugly stump. It was a whale without a tail. "My jaw literally ...