We humans are smart, to be sure, but if we’re so smart then how come we can’t figure how we got so smart in the first place? Think about that! We sure did and we go over some theories in this super interesting episode.

Selects: How Narcolepsy Works
52:41

Rope, yeah ROPE!
43:31

Short Stuff: Did a shipwreck double the size of the United States?
11:46