Not only optional
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“Very intelligent and funny podcast; you always learn something you didn't know”
Benny3.14 via Apple Podcasts ·
Sweden ·
10/14/16
More reviews of Completely Optional Knowledge
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“So much joy from this wonderfully silly yet extremely educational podcast. I'm enlightened each time I listen to something I've rarely thought about yet now cannot live without. Keep up the great work, my friend. This world is a great big wonderful place. Thank you for exploring the ins and outs...”Read full review »
No.1_Son via Apple Podcasts ·
United States of America ·
01/23/17
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“Smart, geeky, and creative! A fun podcast that takes me far across the globe to hear quirky science tidbits from experts who love what they do. Light-hearted and funny, too.”
diana64683 via Apple Podcasts ·
United States of America ·
05/27/16
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“These were really interesting and easy to digest. The most you will learn in 8 minutes this week!”
ryschlee via Apple Podcasts ·
United States of America ·
10/21/15
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