Dr. Kimberly Stewart, also known as the Turtle Lady of St. Kitts, is already waiting at midnight when an 800-pound leatherback sea turtle crawls out of the Caribbean surf and onto the sandy beach. The mother turtle has a vital job to do: dig a nest in which she will lay eggs that will hatch into part of the next generation of leatherbacks. With only one in a thousand of the eggs for this critically endangered species resulting in an adult sea turtle,...