If the U.S. wants to “retire” from leading the free world, a new grouping of democracies should step up, Anders Fogh ...

Denmark, concerned about the climate impact of mass tourism, is trying to encourage people to find more sustainable ways to visit and explore its capital Copenhagen. Last summer, tourists were able to ...

Just as species adapt over generations, our body's cells accumulate DNA changes throughout life. Most are harmless, yet a few "driver" mutations give a cell a competitive edge and can spark cancer.