Century-old photographs reveal that a Spanish national park's most treacherous terrain is doing more for rare plants than a hundred years of protection.
Thousands of megalithic jars in Laos were carved for burial rites. Two millennia later, they're miniature ecosystems, and ecologists have started taking notes.
When you mount a plant on a sheet, you capture more than botany. A new paper reveals the unexpected historical treasures hiding in herbaria, and why closing them is a mistake.