It's Much Work, Measuring Turtles

Self-Righting ObjectThis object, which is of uniform density, is self-righting. It has a second balance point that is "unstable"/highly susceptible to perturbation (when I first read the article I thought it said it didn't have such a point, which freaked me out). I love mathematical objects that are complex and yet arise from (presumably) simple causes (irrational numbers, Julia / Mandelbrot sets, etc.).

My favorite part of \<a href=""" target="_blank" rel="noopener noreferrer">the article though, is that the mathematicians noted the similarity of the shape to certain turtle shells. They are now attempting to find if any turtles are inherently self-righting with no leg wiggling. But "It's much work, measuring turtles."

Original post by  Fabian