A yellow band across a wing might look like a simple flourish. In the South American rainforest, it can mean survival. Across butterflies and a day-flying moth that split from one another tens of ...

Biologists are closing in on a puzzle that seems to turn classic evolutionary logic inside out, yet may be so common that it deserves to be called a new rule of life. Instead of always purging harmful ...

In this computer simulation of a self-replicating structure, the pink square represents the signal to degrade the connection between the "parent" structure (left) and its "offspring" (right). This ...