When a man named Cliff packaged book summaries in yellow and black booklets he changed the way kids learned. But was he just creating a cheat code?See omnystudio.com/listener for privacy information.

Today Chuck and Josh look at the interesting relationship between figs and wasps.See omnystudio.com/listener for privacy information.

You don’t have to be a hardcore vegan to eat a plant-based diet (although you can be). There’s a whole variety of degrees people adopt phasing out meat from their plates. One kind is even called flexitarian for goodness sake. Seems pretty welcoming to us.See omnystudio.com/listener for privacy information.

We all scream for ice cream, sure, but did you know we're all technically screaming about a colloidal foam? As you hit play on this classic episode, prepare for deep cravings that will surely emerge as you learn the history of ice cream, how to make it yourself and lots more.See omnystudio.com/listener for privacy information.

One of the longest-running television shows in history is also one of the best. Sesame Street was conceived as a radical idea – to give disadvantaged preschoolers a leg up in getting ready for school. It ended up becoming a beloved institution worldwide.See omnystudio.com/listener for privacy information.

Australia is home to all sorts of things that can kill you, but perhaps the deadliest is the drop bear, a vicious cousin of the koala.See omnystudio.com/listener for privacy information.

Around 2013 heroin users in the US and other countries suddenly started dying from overdose in previously-unseen numbers. The culprit turned out to be the incredibly potent drug fentanyl and it soon created a massive new wave in the opioid epidemic.See omnystudio.com/listener for privacy information.

Muzak got a bad reputation as bland garbage music. In this classic episode, we aim to set the record straight.See omnystudio.com/listener for privacy information.

MI6 is The UK's version of the CIA. Except they came first and provided the model. But there's still a lot we don't know about this notoriously tight-lipped organization. See omnystudio.com/listener for privacy information.

Rocks that grow baby rocks – wut?!See omnystudio.com/listener for privacy information.