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

The 2,000-pound leatherback is the fourth-largest reptile. Leatherback turtles can grow up to eight feet long. Unlike other reptiles, leatherback turtles use thermoregulation to warm up or cool down.

Leatherback sea turtles start life the same size as other sea turtles. As they age, however, they grow progressively larger. These giants of the reptile world are relics from the Late Triassic and the ...