The Perfect Chalk

The Perfect Chalk Chalk has been used by humans as a communication tool for thousands of years. Are some technologies too good to be replaced? Image: contri via Flickr Things mentioned in this podcast: - 2015 article expounding the virtue of Hagoromo chalk (https://gizmodo.com/why-mathematicians-are-hoarding-this-special-type-of-ja-1711008881) For more Cognitive Engineering episodes find us on iTunes, Google Play or wherever you get your podcasts, or add this RSS feed to your preferred player: feeds.soundcloud.com/users/soundcloud:users:219479129/sounds.rss