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Naturalist and author Kelly Brenner is on a mission to shed light on some of the lesser-known species that cohabitate with us in our urban ecosystem. The tiny three-spined stickleback is one of those creatures. Lake Washington's sticklebacks are famous in scientific circles for a unique evolutionary quirk. Before the lake was cleaned up, the murky water protected the stickleback from predators so well, they let down their spikey defenses. But in one of the first documented cases of reverse evolution, following clean-up efforts that began in the 1960s, they were forced to evolve again to survive. Produced by David Albright.

More info about Be'er Sheva Park and Mapes Creek: https://www.seattle.gov/parks/find/parks/beer-sheva-park