In this 71st in a series of live discussions with Bret Weinstein and Heather Heying (both PhDs in Biology), we discuss the state of the world through an evolutionary lens. In this episode, we talk about trees and mental health and lockdowns and polar bears. Among other things. Does having trees outside your window help mitigate depression? If so, how close do they need to be? Does it matter what species they are? What’s so great about trees anyway? What about rivers or birds or volcanoes? Also: how do extended lockdowns affect teenagers in particular? What do we lose when we close schools, shut down organized sports, keep people from socializing? And: what do polar bears eat when melting sea ice keeps the seals out of reach? Duck eggs of course! Our book, A Hunter-Gatherer’s Guide to the 21st Century, is now available for pre-sale at amazon. Publication date: 9-14-21: https://www.amazon.com/dp/0593086880/ref=cm_sw_r_tw_dp_5BDTABYFKRJKZBT5GSQA DarkHorse merchandise now available at: store.darkhorsepodcast.org Find more from us on Bret’s website (https://bretweinstein.net) or Heather’s website (http://heatherheying.com). Become a member of the DarkHorse LiveStreams, and get access to an additional Q&A livestream every month. Join at Heather's Patreon. Like this content? Subscribe to the channel, like this video, follow us on twitter (@BretWeinstein, @HeatherEHeying), and consider helping us out by contributing to either of our Patreons or Bret’s Paypal. Looking for clips from #DarkHorseLivestreams? Here are some, updated frequently: @DarkHorse Podcast Clips Theme Music: Thank you to Martin Molin of Wintergatan for providing us the rights to use their excellent music. Q&A Link: https://youtu.be/sOzo7KThjWk Mentioned in this episode: Marselle et al 2020. Urban street tree biodiversity and antidepressant prescriptions. Scientific Reports, 10(1): 1-11. https://www.nature.com/articles/s41598-020-79924-5 Mitchell et al 2015. Neighborhood environments and socioeconomic inequalities in mental well-being. American journal of preventive medicine, 49(1): 80-84. (paywalled) MacGillis, March 8, 2021. The Lost Year: What the Pandemic Cost Teenagers. ProPublica. https://www.propublica.org/article/the-lost-year-what-the-pandemic-cost-teenagers Jagielski, et al 2021. Polar bear foraging on common eider eggs: estimating the energetic consequences of a climate-mediated behavioural shift. Animal Behaviour, 171: 63-75. https://static1.squarespace.com/static/59845a6359cc687d5ab8fd4d/t/5fcf8327505b451de18fbdf9/1607435075723/1-s2.0-S0003347220303316-main.pdf Timestamps: 00:00 Welcome and Bret’s hair 01:58 Importance of nature for human wellbeing https://www.nature.com/articles/s41598-020-79924-5 24:30 Causes of depression 41:18 Diversity of trees 50:25 The cost of the pandemic for teenagers https://www.propublica.org/article/the-lost-year-what-the-pandemic-cost-teenagers 01:05:30 Polar bears changing behavior as sea ice melts 01:10:43 Eagle thumbnails 01:12:27 Correction 01:14:45 Ibram X. Kendi 01:16:38 Wrap up