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Global landmarks including the Eiffel Tower in Paris and Sagrada Família Basilica in Barcelona switched off their lights for an hour at 20:30 local time on Saturday night to mark Earth Hour.
The global event, organised by the World Wide Fund for Nature, takes place every year to raise environmental awareness.
It aims to encourage people to turn off their lights for 60 minutes and the event first started in Sydney, Australia, in 2007.
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Watch timelapse of Artemis II rocket rollout to launch pad
The 98m tall Space Launch System (SLS) and Orion spacecraft made a four mile journey from their assembly building to Pad 39B at the Kennedy Space Center in Florida.
Tenerife hit by snow as Storm Therese batters Canary Islands
Tenerife hit by snow as Storm Therese batters Canary Islands
What happens in space during a medical emergency?
BBC science correspondent Pallab Ghosh explains what happens if an astronaut gets ill in space.
Watch: Stunning celestial events that lit up the skies in 2025
From meteor showers to supermoons, here are some of the sights that wowed stargazers this year.
Zoo celebrates arrival of Haggis the pygmy hippo
Science & Environment
Flood alerts as Storm Benjamin hits South East
Science & Environment
Watch: Weather forecast as Storm Benjamin hits England and Wales
The Met Office has issued yellow severe weather warnings for both wind and rain.
'Nature should run through a city the same way that water does'
Baroness Kathy Willis talks about the importance of green and blue spaces in cities.
Inside the lab analysing the world's oldest ice
Studying samples from the ice sheet gives an environmental record of over a million years.
Water voles reintroduced to River Wey
Science & Environment
Is Trump right about wind power and UK energy bills?
President Trump has suggested this week that wind power is the reason for rising energy bills in the UK. BBC Verify's Ben Chu takes a look at the data.
Watch: London Zoo's capybaras and tortoises on weigh-in day
London Zoo in Regent's Park holds its annual animal weigh-in, with zookeepers weighing and measuring over 10,000 animals to monitor their health and wellbeing.
The Donegal man shearing sheep all over the world
Science & Environment
Watch: Meteor shower seen in skies above UK
The astronomical event was captured on camera at North York Moors National Park on 13 August.
Storm Floris to bring 'unseasonably strong gusty' winds to UK
Storm Floris to bring 'unseasonably strong gusty' wind to UK
Triceratops' secret weapon in fight with T. rex
Science & Environment
Could this faraway world be home to life?
Researchers studying planet K2-18b's atmosphere have detected signs of molecules which on Earth are only produced by simple organisms.
Katy Perry kisses the ground as Blue Origin crew return to land
The all-female crew are back on Earth after reaching space on Jeff Bezos' Blue Origin rocket.
Watch: Moment Blue Origin flight with all-female crew blasts off
The six women, including pop star Katy Perry, took off from Texas on Jeff Bezos' Blue Origin rocket.
Partial eclipse darkens sky over UK and abroad
The eclipse won't be total anywhere in the world, but parts of Canada will come close.
