John Green reviews Halley's Comet, a celestial body visible from Earth once in a lifetime, and cholera, an infection caused by bacteria and people. Thanks to audible for sponsoring today's episode: http://audible.com/anthro
Students at International School of Beijing, American School in London, International School of Prague
Adam Ashton & Adam Jones
Aditya Jaykumar (AJ)
qWhat IS This?q
Kati Whitledge
Joe Fairless
Logan Hedrich
Campfire Media
Federal News Network | Hubbard Radio
Srushti Jain
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