Shark nets protect 51 beaches in New South Wales, including Bondi Beach. But opponents of the nets argue they are ineffective, outdated, and harmful to the ocean ecosystem — and they may not be used ...

The Yarlung Tansgpo / Brahmaputra dam shows we often don’t know how to deal with rivers that cross national borders.

We're pausing our live coverage of the war in Ukraine. We'll be back with any breaking news, but in the meantime you can scroll down to catch up on today's developments. And here's a summary of ...