Major cities around the world marked Earth Hour on Saturday night, shrouding some of humanity's most famous monuments in ...

That's all for our live coverage today, but we'll be back with more updates and analysis tomorrow. If you're just checking in, here is a recap of the key developments today: The US and Russia held ...

Clouds from infrared image combined with static colour image of surface. False-colour infrared image with colour-coded temperature ranges and map overlay. Raw infrared image with map overlay. Raw ...