An ambitious new system will track scores of species from space—shedding light, scientists hope, on the lingering mysteries of animal movement.

Millions will be displaced. Where will they go?

Orthopedic surgery would have bankrupted us in the United States. So we went to Mexico instead.

An archipelago off the African coast and its migration crisis.

Inside the effort to prevent migrant deaths at the US-Mexico border.

How extreme weather, which displaced more than a million people last year, could reshape America.

A case of mistaken identity leads to the prosecution of an ordinary Eritrean for human smuggling.

Every year, thousands of teenagers from one city in Nigeria risk death and endure forced labor and sex work on the long route to Europe.

In the last year alone, over 150,000 people have risked their lives to leave.

The deserted villages of Senegal.

The disappearance of the Ghost Boat and its 243 passengers off the Libyan coast.

Afghans have long visited falbin to have their futures foretold. Fundamentalist Muslim clerics hope to stop that.

Christopher Catambrone wants to help illegal migrants who try to cross the Mediterranean in ill-equipped, unsafe boats. But it’s hard to do alone.

What overcrowded and swelling Bangladesh can tell us about how the planet’s population, more than 1/3 of which live within 62 miles of a shoreline, will react to rising sea levels.