This Monday, October 23, marks the first-ever Half-Earth Day. The E.O. Wilson Biodiversity Foundation and National Geographic timed the event to occur exactly half a year after Earth Day (April 22 ...

When I first learned that October 22 marks Half-Earth Day, I thought it was because the date is six months to Earth Day. (True.) But it’s got a message all its own, writes Lydia Strohl.

When I first learned that October 22 marks Half-Earth Day, I thought it was because the date is six months to Earth Day. (True.) But it’s got a message all its own, writes Lydia Strohl.