The Gaia telescope spotted more than 6,000 sunlike stars, all of which appear to have migrated from the galaxy's center more than 4 billion years ago.

Tracking migrants is a challenging task that policymakers, researchers and humanitarian organizations have long struggled to achieve. The data they use is often outdated, incomplete and inconsistent ...

Tracking global migration has long been hampered by poor, outdated data. Now researchers have harnessed social media data to create a near real-time map of international movement. Tracking migrants is ...