Not only optional
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
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
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
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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