I saw a post on reddit asking whether imaginary numbers were actually any use at all.
My response was getting so long, I decided to post it here:
Benoît Mandelbrot has passed away.
Mandelbrot is one of the few mathematicians whose contributions – at least some of them – can be immediately recognised and appreciated by a number of non-mathematicians. His name is attached to the now famous Mandelbrot set, beautiful pictures of which are immediately recognizable, and stunningly beautiful.