I first learned about this from a recent (and excellent) Practical Engineering video [1] on the shape of cooling towers. [1] https://www.youtube.com/watch?v=tm

I first learned about this from a recent (and excellent) Practical Engineering video [1] on the shape of cooling towers. [1] https://www.youtube.com/watch?v=tmbZVmXyOXM https://www.youtube.com/watch?v=tmbZVmXyOXM