Learn more about the legendary Hagoromo chalk on the latest episode of Great Big Story , a new podcast from CNN about the surprising stories all around us. It's the math world's best kept secretAnd among the academic crowd, Hagoromo Fulltouch Chalk is the math world's best kept secret. "Hagoromo definitely has a cult following, but that cult might be nearly all mathematicians at this point. When Hagoromo announced it would end production, many mathematicians began stockpiling boxes of the chalk. Dave Bayer stands in front of a blackboard covered in Hagoromo chalk.

Source: CNN August 22, 2020 15:22 UTC