Bill Nye joins Rachel, Claire, and Eleanor on the show this week. Facts range from how pigeon poop led to the verification of the big bang to why your brain ignores gorillas and killer clowns lurking right in front of you. Whose story will be voted "The Weirdest Thing I Learned This Week"?

The Weirdest Thing I Learned This Week is a podcast by Popular Science. Share your weirdest facts and stories with us in our Facebook group or tweet at us!

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