Nicaragua’s proposed Grand Canal would be one of the world’s largest engineering projects. Its proponents say it could transform the country’s economy, while critics say it could be an environmental …

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

The United States has long tried to negotiate a resolution to the Israeli-Palestinian conflict, but several factors, including deep divisions between and within the parties and declining U.S. interes…