by Howard Covitz
The astrolabe is an astronomical calculator dating back at least 2000 years. Once you have walked through how to use the darn thing, you will appreciate firsthand just how much ""they knew back then"".
Firewalking Myth or Mastery?
Vincent J Kellsey
Grow your own future
How to see a rainbow
The plight of the digital chicken
Ignite CheongChun 이그나이트청춘 2018 - 이민호 "해결사보다 강력한 해소사"
How an atheist found religion in chaos.
The God confusion