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!

Friends rule! The best ones are those that are always there to help you out, embark on a strange adventure, make you laugh so hard you cry and appreciate all the weird and wonderful things that make you… you! We love our friends! But do we humans need them as a species? We talked to psychologist/biologist Lauren Brent to find the answer.

Do you and your BFF have a question? Send it to us at BrainsOn.org/contact, and we’ll be a friend and help find the answer!

Most of us have used a glue stick or Elmer’s, but what about the strongest glue in the WORLD? We got a fantastic question from a couple of listeners who wanted to know what the strongest glue is, so we reached out to biomedical engineer Danna Sheridan to help us find the answer.

Got a question that’s sticking in your mind? Send it to us at BrainsOn.org/contact, and we’ll help unglue the answer!