A new study suggests that the transformation takes place via crystals (crystals!) arranged within the reptiles' skin.

Radioactive boars and bunnies won’t let us forget about the nuclear disaster.

A killer fungus could be changing. Or the frogs themselves could be evolving.

Sheltering in place produced a “natural experiment” for urban wildlife.

To study something as freewheeling, spontaneous, and variable as play, researchers had to get creative.