How do planes stay in the air? And how did humans figure out that it wasn’t enough to just strap wings to our arms and flap them like birds?We’ll find out about the invention of airplanes and our co-hosts will share the frustrations and joys of being inventors themselves. Plus: An aviation-inspired mystery sound and paper airplane tips! Plus a new Moment of Um answers the question: “What’s the most sour thing in the world?” Today’s episode is sponsored by Madison Reed (madison-reed.com and offer code BRAINS). You can help us find new sponsors by filling out this anonymous survey: podsurvey.com/brainsSee omnystudio.com/listener for privacy information.