Adrián Simancas, 23, was kayaking off Chilean Patagonia when he found himself inside a whale.

Paddling in the Strait of Magellan, Adrián Simancas was caught in a humpback’s lunge. “I realized that I was in something’s mouth and I had been eaten,” he said.

New research from the University of Washington finds some baleen whale species call at such deep frequencies that they’re completely undetectable by killer whales, which cannot hear sounds below 100 ...