The Mysteries About True History's podcast is back for season two.

If you're a kid who would love to travel through time to solve cool mysteries,

perplexing puzzles, and tricky riddles,

then this podcast is the perfect audio treat for you.

Every week, join me, Molly, and my best friend Max,

as we take our problem-solving skills to amazing places like ancient Egypt,

ancient Greece, or the Galapagos Islands in 1875 to help out the one and only Charles Darwin.

We never know where we're going to wind up or what we're going to find, which is all part of the fun.

So put on your time traveling shoes and listen as a family.

You can listen to mysteries about true

histories on Apple Podcasts, Spotify, or wherever you listen to podcasts.

Hello, Smarty Pants. You're listening to the first edition of SmartEQs, a bonus segment just for our Who Smarted Plus subscribers, where I, the trusty narrator, answer questions submitted by you, the Smarty Pants.

Our first question is from Charlie in Brisbane, Australia, who asks,

How is stained glass made?

Well, Charlie, before you can make stained glass, you need to make regular or plain glass.

Plain glass is made by heating up sand.

That's right, the stuff you make castles with at the beach, to a super duper high temperature

until it melts into a molten liquid state. How hot does sand have to get before it melts?

Roughly 3,090 degrees Fahrenheit, which is about how hot a space shuttle gets as it reenters

Earth's atmosphere. Once the sand is in a molten state,

various metallic oxides are mixed in to color it. Copper for red, cobalt for blue,

manganese for purple, antimony for yellow, and iron for green, turning plain glass into stained glass.

...