Archaeologist Eric Cline on what caused the simultaneous collapse of the Mycenaeans, Hittites, and most other major civilizations at the end of the second millennium BC, thus ushering in the world's first dark ages. Hint: it wasn't just the Sea Peoples.

Four astonishing archaeological discoveries that extended our knowledge of history back into the mythical past: Champollion and the Rosetta Stone, Grotefend's cuneiform breakthrough, Schliemann digging for Troy, and Michael Ventris' deciphering of Linear B.