Invaders from the North

In George R. R. Martin’s Game of Thrones, the people of The Kingdom of the North build a 700-foot-tall wall between them and the wild... Read more

The Earliest Arrivals

“Nature abhors a vacuum,” is how the famous phrase goes. Whenever I see it, though, I always think it’s missing a follow-up sentence: “And evolution... Read more

The World in a Weed

Ever since the first flowering plants emerged about 130–140 million years ago, they and those that eat them have been engaged in a kind of... Read more

Spring Mosaic

For many of us, the past weeks of spring migration have been glorious, a bounty of warblers, tanagers, and dozens of other species passing through... Read more