At the COP27 summit, leaders will discuss how to deal with the many consequences of climate change. These four cases show how the climate crisis is altering the threat of zoonotic diseases.

The Democratic field could touch on a number of foreign policy issues, from climate change to Iran, during its first prime-time sparring session.

The world is inching closer to eradicating polio, but armed conflicts and opposition to vaccines stand in the way of finally eliminating the disease.

Japan's constitutional debate is about not simply the document's past but also the nation's ability to respond to twenty-first-century challenges.