<p>The biggest volcano in our solar system is not on Earth -- and its footprint is as big as the entire state of Arizona.</p>

The biggest volcano in our solar system is not on Earth -- and its footprint is as big as the entire state of Arizona.

Volcanoes in space!

Brains On!® is a science podcast for curious kids and adults from American Public Media. Each week, a different kid co-host joins Molly Bloom to find answers to fascinating questions about the world sent in by listeners. Like, do dogs know they’re dogs? Or, why do feet stink? Plus, we have mystery sounds for you to guess, songs for you to dance to, and lots of facts -- all checked by experts.

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Volcanoes in space!

Volcanoes in space!

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