From Twitter https://twitter.com/drsekula:

RT @symmetrymag: Looking for a different design for your jack-o'-lanterns this year? We've got you covered: http://www.symmetrymagazine.org/article/frightfully-smart-jack-o-lanterns https://twitter.com/symmetrymag/status/656581264170815489/photo/1 https://chirp.cooleysekula.net/attachment/3777