Look at how a contrail is sort of like a scroll of water vaper, or a line drawn in clouds. Just a reminder: We here at the place have decided to start archiving things in the interest of saving download times… right now it is by month (or rather thirty day increments), so if you get down to the end of this page, please check out Febuary and March in the archives. Thanks.
Pyramid: a geometry for perspective, from omEGG, ITIN ’04
