Baby leatherback sea turtles hatch from their eggs laid deep under the sand in about two months. A leatherback sea turtle lays an average of 100 eggs in a nest chamber. Due to predation and human causes, many of these baby leatherback sea turtles will not reach adulthood. Those leatherbacks sea turtles that do survive will return to nest near the same beach where they were born approxiamately sixteen years later. Learn more about leatherback sea turtles.