Unearthed dinosaur bones, shipwrecks, and other archeology reveal secrets of world history, like finding the Japanese midget submarine sunk by the USS Ward off Pearl Harbor during World War II; discovering the homes of Tejanos at the Alamo from before the Battle and the original defensive walls were adobe, not stone; and realizing tyrannosaurs may have been smart pack hunters based on an extensive fossil bed at Grand Staircase-Escalante National Monument in Utah.