If I hadn’t been watching with my own eyes, I might not have believed it myself. But here she was, a monarch butterfly, intently probing a dead plant in the middle of a vibrant patch of flowers she all but ignored. Unaware of the scientific literature, she didn’t know that her kind wasn’t supposed...

The house next door sits vacant, placed on the market after the last renter moved out. A succession of owners has knocked down walls, replaced carpeting and installed standard-issue appliances. Edging the exterior are shrubs from conventional landscaping palettes, including invasive species that...

MURCHISON, Texas—The wild Assateague Island horse who was removed from the Maryland tourist attraction by the National Park Service last month, is settling in seamlessly at Black Beauty Ranch, part of the Humane Society of the United States. The 13-year-old horse named Delegate’s Pride—also known as...

Sometimes my most significant revelations are the annoying, kick-me-in-the-pants ones that follow a period of contented denial. One of those seismic shifts in thought came last year at a dinner party, when a man nearly half my age honed in on a flaw in logic I’d subconsciously buried. A plant...