Meet two of the STEM professionals that work at Local Motors in Chandler, Arizona.

At the third stop on our road trip series, we coast in for a pit stop and check out car design.

On the first leg of our road trip, we’re exploring the history of engines and how they work, with a little help from Car Talk’s Ray Magliozzi.

In this episode, we’re answering a question from listener Katelynn: “Why is car exhaust bad for the planet?”

On the fourth leg of our road trip, we figure out where traffic comes from and what it would take to make it finally go away.