Hey, Smarty Pants and Smarty Families, trusty narrator here with a must-listen podcast I Know Your Love.

It's a show called Steam Daydream, made by our friends at National Children's Museum in Washington, D.C.

In the new season of their show, they investigate everyday mysteries like why bubbles around and where trash goes

to uncover the science, technology, engineering, art and math that explains the world around us.

Every episode is 20 minutes or less and features real life experts and curious kids like you.

You can follow the fun by searching Steam Daydream with National Children's Museum wherever you listen to podcasts.

Hello Smarty listeners, please take a moment and leave us a five-star Apple rating review.

It not only helps us grow the show, but we might also read your review on Who Smarted.

So do it now and don't forget, you can listen to Who Smarted anywhere, including Apple podcasts, Spotify and Amazon Music,

including hands-free listening powered by Alexa on all Apple, Android and Echo devices.

Psst, hey Smarty Pants, recognize these sounds.

Why, of course, it's your mom trying to feed you vegetables when you were three.

Open wide, here comes the train choo-choo!

Uh-huh! Just kidding. Those are the sounds of an actual train.

And whether it's a free train or a people train, trains have been around for more than 200 years.

Have you ever ridden on a train? Maybe it was to visit another town or city or state,

or maybe you rode a subway underground. Whether it's a long ride or a quick trip,

riding the rails sure is something special.

Did you know that there are more than 1.3 million kilometers of train tracks covering the planet?

That's more than enough track to travel to the moon and back, and then back to the moon again.

That's one small choo-choo for man and one giant chug-a-chug-a for mankind.

Any guess which country has the most train tracks?

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