Whale hunting in the 20th century significantly reduced the genetic diversity of the ocean giants, with particularly devastating effects on two species.
Over the past four years, hundreds of gray whales have washed up dead on the beaches of Mexico, the U.S. and Canada, most of them skinny and malnourished – and scientists have been trying to figure out what’s causing the majestic animals to die en masse for so many years.
Hundreds of gray whales recently washed up dead; researchers just found out why masslive.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from masslive.com Daily Mail and Mail on Sunday newspapers.