Dr Craig R McClain @drcraigmc.bsky.social · 06/10/2026Great question, but translation alone just gives you a corkscrew. To get a tusk you crank a different dial: make the tube widen so fast it never finishes a single coil, and keep it far from the axis so it only gently bends. 160
Dr Craig R McClain @drcraigmc.bsky.social · 06/10/2026Turns out a tusk shell is basically a snail that never got around to coiling. In Raup's model it's a tube flaring so fast it finishes only a third of a turn, set far from the axis (Right). Pull translation instead and you get a corkscrew (Left). 🧪🐚 #SciArt 180
