Europe’s most celebrated cities have become victims of their own success, with Rome’s Colosseum drowning in selfie sticks, Paris charging $8 for coffee near the Eiffel Tower, and Amsterdam’s canals ...

Scientists say a species of bacteria rewrites the history of when an infectious and potentially deadly disease first arrived in the Americas. And it was long before the arrival of European explorers.

It is said that the fox knows many things while the hedgehog knows one thing. In book terms, Matthew Lockwood’s “Explorers” is a hedgehog. Short and snug, it bristles with stories about people who ...