Frazzled? Go for a walk in the woods. It'll calm you down, fill your nose with lovely smells, and reset your eyes to room temperature. But why?  According to today's guest, humans evolved to need to chill out in natural environments. It gives us nice chemicals like serotonin, is good for long term mental health, and generally resets our stress alarms. This is the idea of Biophilia, and it's rather nice. Joining Dave this episode is Dr Lauren Hall Ruddell - a  journalist and naturalist  who has spent many years thinking  about the restorative power of being in nature.  We talk about all things biophilic, and how losing the nature we evolved to need is one of the biggest tragedies of the climate crisis. The opening poem thingy is an extract from "A Transparent Eyeball" by Ralph Waldo Emerson, read by Ruth Everett. Owl noises: -- 08:43 - Attention Restoration Theory - a fascinating, still-developing field which posits that being in nature can restore your, well, attention. -- 12:12 - Default Mode Network - the surprisingly large amount of brain activity that goes on when you're not thinking about anything in particular. -- 18:53 - Savannah Theory crops up in this interesting article about why so many companies put pot plants all over their offices. -- 19:40 - Cows face north! Your Brain on Climate is a podcast about human psychology vs the climate crisis: what we think, why we think it, and how it all adds up to a planet-sized emergency.  Contact the show:  @brainclimate on Twitter, or [email protected]. Support the show on Patreon: www.patreon.com/yourbrainonclimate. The show is hosted and produced by me, Dave Powell, who you can find @powellds on Twitter.  Original music by me too. Show logo by Arthur Stovell at www.designbymondial.com.