Hiding

Ten thousand years or more ago, people began painting the walls of caves near Bhopal, India. Over the millennia, they made thousands of images in what is now the Bhimbetka Rock Shelters: men, women, a couple having sex, dancers, children,…

Weighing up to 380,000 pounds and about 30 meters long, the blue whale - the largest creature to ever live on earth - seems difficult for human eyes and ears to miss at first.But a previously unknown population of Leviathans has lurked in…