It's that time again. Join Robert, Joe and Christian for another round of robot-delivered listener mail. They're read your missives concerning everything from the Chinese zodiac and psychopaths to solar sails, MDMA and the X-Files.
Listener Mail IV: The Listening
Image Credit: Vizerskaya/Getty Images
10 Human Rituals of Pain (list/gallery)
A Six Course Feast of Dangerous Foods (podcast)
Thaipussan festival photos from by Gary Krupa (Singapore, 2015):