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The podcast where we answer the questions you never knew you had. Produced by Andrew Norton with music by Breakmaster Cylinder.
Listen to Completely Optional Knowledge, a Science & Medicine podcast by #CompletelyOptional. Stream 35 episodes in English, follow new audio stories, and play episodes online on Radio and Podcast.
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Brigitta Green from the perennial winter wonderland of Minnesota has a fitting question for us about ice. After a mysterious, late night how...

What's the coolest or weirdest official name for a species of plant or animal? And how do they get those funny sounding Latin names anyway?

Is a watermelon a vegetable? Biologically it’s logical, but does the answer depend where you live?

Zookeeper Rick asks why why animals see color differently? Dr. Jay Neitz of the University of Washington Department of Ophthalmology says th...

Listener Ross Wintle, driving past a cemetery near his home, wonders if animals other than humans have rituals around death? Barbara J King,...

Listener Matthew Hollingshead, a skateboard enthusiast, asks why it’s so funny to watch people get hurt. We’re not necessarily talking about...

Hilah Johnson hosts a show about cooking (and, naturally, eating)and she came to us with a very on-brand question. Do animals have eating co...

Listening to Shohini Ghose talk about what would happen if a human reached light speed in Episode 16, Fred Papon of Australia wanted to know...

Dallas College professor Patrick Moore, seeing his dog Abbey eating her own poo and swallowing dirty socks, wonders how animal tastebuds wor...

Molly and John Knefel, sister and brother co-hosts of the daily podcast “Radio Dispatch” wonder why siblings become rivals. Naomi White, PhD...

Inspired by freeze-dried ice cream at Space Camp, podcast producer of 99% Invisible Avery Trufelman wonders what the sun really sounds like...

Breakmaster Cylinder, creator of the Completely Optional Knowledge theme music, wonders if music can be used to trigger specific responses i...

Lauren Ober is the host of WAMU's The Big Listen. She wanted to know the answer to a relatively simple question - what is wind? With help fr...

Jonathan Mehring has photographed all over the world, but there’s one place he hasn’t been yet that he’s dying to learn about: outer space....

Have you ever seen an ant just … hanging out? Completely Optional Knowledge listener Bryan Fox hasn’t, and it’s getting under his skin. To g...

Who makes the rules in outer space? That’s what Completely Optional Knowledge listener Tim Burberich called in to find out. So we got in tou...

Emily Schorr Lesnick is the co-host of the SoulGlo podcast, a show about how diversity helps humans thrive. Naturally, she wants to find out...

Jessica Abel is working on a new book about Mars (Trish Trash: Rollergirl of Mars - available in November 2016) - which got her wondering ab...

Tom Sortodden wants to know what would happen if he went the speed of light. Physicist Shohini Ghose of Wilfrid Laurier University explores...
You can listen to Completely Optional Knowledge episodes online on Radio and Podcast. Open an episode and the site player will stream the available audio.
Completely Optional Knowledge is listed as a Science & Medicine show. The show language is listed as English.
This page lists 35 episodes for Completely Optional Knowledge. More episodes are available from the View more button when the list continues.
You can listen to Completely Optional Knowledge episodes on this page by opening an episode and using the site player.
Completely Optional Knowledge is listed as a Science & Medicine show by #CompletelyOptional.
This page lists 35 episodes for Completely Optional Knowledge where feed data is available.