Berlin's Brandenburg Gate, Paris' Eiffel Tower, Rome's Vatican and Barcelona's Sagrada Família have joined the WWF's Earth Hour in switching off their lights for an hour to raise awareness of climate change and energy use.
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Dozens of people have been evacuated from a Russian ship after a collision in the Black Sea.
It comes just days after a father streamed himself murdering his daughter before killing himself on the social media platform.
Still got an old style paper £5 note? Well, you only have until Friday to spend it in shops before it ceases to become legal tender.