Every year, gray whales embark on one of nature’s most epic migration journeys. Here’s what we know about it, according to ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

LAST YEAR net migration to Britain halved: the country’s population grew by just 431,000, down from 860,000 in 2023. In the final quarter of 2024 some 60,000 people, net, moved to Canada, a drop from ...

Across the rich world, temporary migration is on the rise. The number of short-term visas offered to working migrants rose by nearly 1m between 2014 and 2023, to 2.5m, with no sign of slowing. The ...

This essay is part of The Great Migration, a series by Lydia Polgreen exploring how people are moving around the world today. We are living in an age of mass migration. Millions of people from the ...

As summer vacations wrap up and kids return to school, one small bird is preparing for a monumental journey. Hummingbird migration season gets underway in August, sending the birds flying to warm ...

This series—featuring scholars from the Futures Lab, the International Security Program, and across CSIS—explores emerging challenges and opportunities that NATO is likely to confront after its 75th ...