The vast transcontinental journeys made every year by millions of feathered migrants were not known to naturalists before the late nineteenth century. Even today, while cutting-edge technology such as geolocators and isotope analysis helps us map the...

Between the surface of the sea and depths of two hundred meters lies a remarkable range of fish, generally known as pelagics, or open-ocean dwellers. These creatures are among the largest, fastest, highest-leaping, and most migratory fish on the enti...