In a first, physicists have directly seen Hofstadter’s butterfly—a long-sought-after fractal in the quantum realm ...

Painted ladies are the ultramarathoners of the butterfly world—even more so than monarchs. Scientists have long known about ...

The outlook for butterflies in the U.S. seems as fragile as their delicate wings, as a study reveals the population of 554 ...

Thousands of new species are found each year. Here are three of our most recent eye-catching stories. The new species was ...

Butterfly collections are a common sight in museums, their brightly colored wings and unique patterns drawing the eyes of ...

Think of it as the “butterfly effect” — the idea that something as small as the flapping of a butterfly’s wings can eventually lead to a major event such as a hurricane — in reverse. The new study, ...

Mountaintops host some of the world's most diverse butterfly species, but climate change could transform these habitats into ...