In this episode, host Emily Graslie learns about a special flower: the Kankakee Mallow. The only place in the world it's found in the wild is on a single small island in the middle of the Kankakee River in Illinois. It hadn't been seen in over a decade and was feared to be extinct. However, thanks to volunteer efforts, the flower is back in bloom. Part of "The Brain Scoop" series.