Leatherback sea turtles start life the same size as other sea turtles. As they age, however, they grow progressively larger.

The leatherback sea turtle (Dermochelys coriacea) is the largest living sea turtle in the world — and also one of the most threatened. According to the IUCN Red List of Threatened Species, the global ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. This one-ton turtle once ruled South America’s rivers — ...