Forensics, archeology, genealogy, and genetics are devoted to figuring out what really happened. In this hour of Radiolab, digging up the past leads to some very unexpected finds.

We begin at a trash dump in Egypt, where we find Jesus, Satan, sissies, and porn. Next, a goat on a cow leads us to hundreds of old letters scattered on the side of Route 101. And lastly, a blood-sampling tour of Asia reveals a prolific baby-maker...and potentially a world conqueror.

***The Greatest Hits of Ancient Garbage

***Goat on a Cow

***Genghis Khan

[September 9, 2007]