Michelle Khare joins Hank to ask him about homing pigeons, knocker-uppers, and why our days are getting longer.
Check out Challenge Accepted: https://youtube.com/michellekhare
00:00 Introduction
00:54 How did they train carrier pigeons?
15:46 How does soap know what’s bacteria versus human cells?
21:47 How did people wake up or show up on time before alarm clocks?
28:35 What do you, Hank Green, think is the coolest fact?
New episodes premiere the last Wednesday of each month at https://youtube.com/complexly
Ask Hank Anything is a new show where our celebrity guests ask Hank Green questions, he does his best to answer them, and they learn a little bit about each other in the process.
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