Thousands of whales are being killed by passing ships. Can we save them?

Large numbers of cetaceans are dying from lethal collisions with vessels, even in protected areas. Now science may provide the means to protect them Janie Wray could tell there was something horribly wrong from the way her colleague gasped. They were on a research station off the coast of British Columbia and Wray's colleague was watching live drone footage through a pair of goggles. "She just went, oh my God," says Wray. She had spotted a humpback whale on its migration south, swimming without ...