Add new comment


This is an excellent piece of expository writing. The supporting graphics and video are superbly chosen. I've read other blog posts on the same or a related topic that just jump right in and confuse constant diameter, width, etc. I found this piece makes everything immediately transparent and correct on a first reading. Thank you for taking the time to think through all these subtleties so clearly.

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.