If you’re looking for the Connections answer for Tuesday, December 30, 2025, read on—I’ll share some clues, tips, and ...

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 ...

Monarch butterflies depend on an internal clock to navigate to their winter grounds in Mexico, researchers have found. Scientists have long known butterflies use the sun and an internal compass to fly ...