Stephan's Friday Picks

• The growing link between microbes, mood, and mental health (Knowable Magazine)
• No, that's not Tayler Swift peddling Le Creuset cookware (NYT)
• The Stanley water bottle craze, explained (Vox)
• Where the CEO of Walmart U.S turns for advice (WSJ)
• From the archives (2008): Wal-Mart chief offers a social manifesto (NYT)