Slime mold was grown on an agar gel plate shaped like America and food sources were placed where America’s large cities are. 

The result? A possible look at how to best build public transportation. 

I just really like the idea of slime mold on a map of the US. It’s beautiful.

Very clever, Physarum polycephalum, very clever indeed. Not bad for a simple web of single-celled organisms able to solve mazes and map the Tokyo rail system using the emergent powers of swarm biology, not bad at all.

My only criticism is that a truly great transportation network should take into account the differing sizes of American cities, so spot those colonies in varying densities or something and see what happens. Also, slime molds should be taught to fly, them we will REALLY be in business. But altogether I give it a 9.8.

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