In 2015, Sarah Allely was hit by a car while riding her bike. She suffered a mild traumatic brain injury, and in the ensuing weeks and months, she found it impossible to function normally.

Only one thing seemed to help: spending time in nature.

Now, several years later, Sarah has turned her experience into a documentary podcast series called Brain on Nature. On this episode, we share an excerpt from her show and talk with her about why nature is so important for the brain — for all of us.