World
News from around the world
City lights at night: the world's cities after dark
From Hong Kong to Toronto, Frankfurt to Bangkok, a light map of cities that come alive at night.
Mediterranean old towns of Calvara and San Telmo close their historic centres to cars
The two hill towns are restricting access to residents, deliveries and emergency vehicles, and visitors will park outside the walls and walk or take an electric shuttle.
Bird migration and wetlands: the season of wings
From flocks of geese filling the sky to flamingos feeding in shallow lakes, scenes from along the flyways.
Wrenhaven bird-ringing station joins flyway census from West Africa to the Arctic
Volunteers at Fenwick Point are among more than 200 sites counting and ringing migrating birds this autumn, building a picture of the journeys made by waders and songbirds.
European bison return to the Kallmar forest reserve after 200 years
Eight bison have been released into a fenced area of the reserve, where scientists will study how their grazing and wallowing reshape the woodland.
Scientists install new sensors on the remote volcanic island of Skarvøy
A team of volcanologists spent ten days on the uninhabited island setting up seismometers and gas detectors that will send readings by satellite every few minutes.