You can buy these 3D printed here: https://etsy.me/3xZppOv In this video I show you two arrows that seem to defy logic. No matter which way you turn them they point the same direction. However, if you just stand on the other side of them they change direction. I talk bout whether or not we can trust our senses and relate it to Plato's cave allegory. The Action Lab Box: https://www.theactionlab.com/ The Action Lab Experiment Book: https://amzn.to/2Wf07x1 Or buy wherever books are sold Follow me on Twitter: https://twitter.com/theactionlabman Facebook: https://www.facebook.com/theactionlabrat Instagram: https://www.instagram.com/therealactionlab/ Watch other popular videos from my channel What's Inside the Worlds' Fastest Heat Conductor? https://www.youtube.com/watch?v=OR8u__Hcb3k Can You Use Umbrellas Instead of a Parachute? https://www.youtube.com/watch?v=zm_7txMrG5U Opening a Bottle of Liquid Nitrogen Under Water! https://www.youtube.com/watch?v=pXlJMTx4kW4 Warning: DO NOT TRY—Seeing How Close I Can Get To a Drop of Neutrons https://www.youtube.com/watch?v=jAgBiFWd-yA My Other Channel: https://www.youtube.com/channel/UCA19mAJURyYHbJzhfpqhpCA *Any experiment you try is at YOUR OWN RISK. The Action Lab assumes no responsibility for any injury if you attempt anything you see in this video or on my channel.