"What Goes Around Comes Around"

We know that in the early days of plumbing, wood was used as pipe.  But look at what these MIT engineers have come up with!

http://www.boston.com/news/science/blogs/science-in-mind/2014/03/05/mit-engineers-test-low-tech-water-filter-inspired-nature/NSCr2KcepwV238vb7TjT6N/blog.html