The number of North Pacific humpback whales plummeted 20 percent in less than a decade, and marine heatwaves may be the main culprit, according to a study released Wednesday that spells a troubled future for the majestic sea mammals

The number of North Pacific humpback whales plummeted 20 percent in less than a decade, and marine heatwaves may be the main culprit, according to a study released Wednesday that spells a troubled future for the majestic sea mammals

by DoremusJessup