The most detailed look yet at the monarch butterfly’s built-in clock suggests it’s an ancient model. The molecular mechanism that keeps the day-night rhythm in the butterfly’s brain shares features ...

The mystery of how the monarch butterfly can migrate thousands of miles across North America without losing its way has been solved after decades of speculation about one of the natural world's most ...

The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. Monarch butterflies ...