Spirals! Spirals appear throughout the universe in spectacular displays of mathematics and science. Also, they’re really cool-looking. And spirals are very nifty to crochet in multiple colours.

This hat starts with a two-colour spiral at the top, and I designed it in part to showcase this neat technique. I also designed it in the wake of the incredibly powerful visual impact Pussyhats made at the Women’s Marches in January. The Hat for Science is a simple craftivist project just in time for the worldwide Marches for Science on April 22, 2017.

ETA on March 29, 2017: A minor mistake was discovered, and the pattern has been updated (the corrected PDF should have “v2” in the filename).