Mac and Kevin ride the ups and downs of roller coasters in this week's loopy episode. Ruby Lou makes a guest audio appearance as well, inquiring on the whereabouts of a floating plastic bag, You must be this tall to listen to the pod.

Mac and Kevin fly into a new topic - pigeons! Some people call them rats with wings, but that's just pigeon-holing them. These little grey doves have a storied history, and a potentially clinical future. Listen in for the scoop on the coop!

Mac and Kevin size up the newest shape in this week's podcast - the scutoid! After being polygon for a while, they get their act in shape and give an unbiased account - no angle - of this newly discovered building block. Scoo scoo!

Mac and Kevin shake it up for season three as they cover Earth tremors in this week's podcast. They don't scale back on Richter even though it's not his fault. This one is seismic. Get comfortable, it's a tectonic plateful.

Mac and Kevin are back (again), and cycle through the process of waste disposal. They com-post their thoughts, reuse old jokes, and trash the tried one-liners. But mostly, they play a recycling game live on-air, a real upcycled use of time.

Mac and Kevin sail into the new year on a wave of concern, taking a deep dive into the Great Pacific Garbage Patch. Frequently called Garbage Island, there's a lot of misconceptions, a lot of finger pointing, but mostly a lot of plastic floating around, and that makes us blue! It may take 10 minutes before we get on topic, but that doesn't mean this episode is trash.

Mac and Kevin whet their palette on ice cream in this week's episode. It's a sweet one. Not great for your derriere, but great for your dairy air. The sound quality takes a rocky road once again, and the intro is a little napoleon, but fight through that brain freeze and you'll love the content in the middle; it's the cookies and cream of the crop.

Mac and Kevin jump straight to the pop science instead of snoozing through the scholarly research on sleeping in this week's episode. It's a dreamy topic, and won't leave you groggy. Plus, another national anthem send off, see if you can recognize the circadian rhythm to this one.

Mac and Kevin run around this week in the world of Bill Cassidy, inventor and owner of the world-renowned St. Louis City Museum. They climb into his unique personality, his uncharacteristic business style, and the incredibly enjoyable output that come from both. It might just be playgrounds for applause.

Mac and Kevin lift themselves past audio issues this week, with their second recording about elevators. Episode one was a bumpy ride, and was wrong on so many levels, so they had to repeat. We are floored too. But this episode will be Muzak to your ears, so press that button!