A long time ago, in a galaxy far far away… we wondered, could you ever build a real lightsaber like the ones in Star Wars? A lightsaber is a glowing sword that can cut through metal – and pretty much anything else you can think of. It’s the favorite tool of heroes like Luke Skywalker and Ahsoka Tano, as well as villains like Darth Vader. That’s just in the movies, but could we make them real? We asked mechanical engineering professor Sayan Biswas to help us find the answer.

Got more questions than Luke when he was training with Yoda? Send them to us at BrainsOn.org/contact, and we’ll help use the force to find an answer!

Records are big flat discs with circular lines on them that you can use to play music. But how does a record work, anyway? We asked audio engineer Josh Bonati to help us find the answer.

Got a question that’s spinning around in your brain? Send it to us at BrainsOn.org/contact, and we’ll help find an answer that’s music to your ears!

Airplanes fly high in the sky and at super fast speeds. But is there a limit to how fast they’re allowed to fly? You know, in the way cars have speed limits? For this episode, we talked to Bobby Sharp, an air traffic controller, who helps us understand if airplanes have a need for speed.

Got a question you need answered fast? Send it to us at BrainsOn.org/contact, and we’ll try our plane old best to get it answered!