Editor's Note: This is the first in a two-part series on turtles. There are over 240 species of turtles worldwide, but turtles are most abundant in eastern North America. Most turtles have good field ...

When we picture sea turtles in the wild, it's easy to envision them as armored warriors—their hard, resilient shells serving as near-impenetrable shields against oceanic threats like sharks. These ...