Joe Roman

If forests are the lungs of the planet, then animals migrating across oceans, streams, and mountains—eating, pooping, and dying along the way—are its heart and arteries, pumping nitrogen and phosphorus from deep-sea gorges up to mountain peaks, from the Arctic to the Caribbean. Without this conveyor belt of crucial, life-sustaining nutrients, the world would look very different. The dynamics that...

Whales are the largest animals ever to have lived on the earth: the longest ever recorded was over 33 metres (110 feet) long, the heaviest more than 171,000 kgs (190 tons); a large Blue Whale's tongue alone can weigh more than an elephant. Whales can stay underwater for more than an hour, live to 200 years, and are among the...