In a tribute to the late founder of HowStuffWorks Marshall Brain, we chose one of his great articles. Learn all about how your phone knows how to get you around without bumping into stuff or running people over in this episode. Thank you, Marshall.

Selects: BPD: The Worst Disorder or Not a Disorder at All?
50:55

Data Centers: Can't Live With Em, Can't Live Without Em
48:14

Short Stuff: Did a vampire legend help win the Cold War?
12:55