120-year-old letter to Santa found but what's on it?
The note from a five-year-old girl was discovered inside a book donated to a charity shop.
The big victories in women's rights
Celebs get on their Christmas jumpers
The view from the edge of space
Will it snow this weekend?
Quiz: Test your knowledge of this week's news
Strange, Stranger, Strangest
What's going on with Brexit right now?
Meet the new Spider-Man from Into the Spider-Verse
What have been your favourite Strictly moments?
Your tree-mendous Christmas photos!
Amazing photos from National Geographic contest
Why do shops divide products by gender?
Sesame Street introduces homeless character
Calling all stargazers! The Geminid meteor shower is coming
Quiz: Christmas traditions from around the world
Everything you need to know about Mary Poppins Returns
Loneliness: Does being online help or make it worse?
Baby seal found in a plant pot
Strictly finalist Joe Sugg dyes hair red!
Theresa May wins vote to keep her job
Shops stop selling some 'unsafe' slime
What's so special about these post boxes?
Massive chocolate spill leaves a sweet mess
Nature has a new fastest animal
Arctic reindeer numbers drop dramatically
Which club will do the best in the Champions League?
Spacewalk investigates 'mysterious hole'
Which is the best bit about your Christmas Dinner?
What do Little Mix listen to at Christmas?
Play: You decide Britain's Brexit future
What's everyone dancing to in Strictly final?
Retouching photos: Is it right or wrong?
Nasa has plans to rescue Iron Man
5 weird facts about UK parliament
Antarctic glaciers show signs of melt
Voyager 2 probe leaves our solar system
Strictly Christmas couples revealed
Why are people talking about racism in football?
'Stop using scars or facial disfigurements to portray movie villains'
Crisp packets recycling scheme launched
Find out who won I'm A Celebrity!
Calls for unity after violent protests in France
5 things we've liked about this Doctor Who series
What is an eating disorder?
Scottish wildcats and other rare UK animals
The new Avengers trailer just dropped
Weird Christmas dinners
What is your Christmas elf up to?
5 alternatives to buying new presents this Christmas
What is a reverse Advent calendar?
Meet the kids who are going for the Christmas number one!
Send us your school nativity play pictures
Why is Advent on 2 December this year?
Ten festive facts to wow your family this Christmas
What to see at the cinema this Christmas!
The Grinch takes on our Christmas game
Quiz: How much do you know about Advent?
Best BBC shows to watch this Christmas
How is Christmas tinsel made?
Why do we have Christmas trees?
Royal Mail reveals 2018 Christmas Stamps
Gallery: The Victorians' weird Christmas cards
What is Advent?
Why do we sing Christmas carols?
'Our favourite things about Christmas in the UK'
Top tips for getting to sleep on Christmas Eve
How do you move a Christmas tree 1,000 miles?
Love Christmas? Maybe you should thank the Victorians
Plane draws special Christmas message
The alternative Christmas trees made by children
The 13 Days of Christmas Doctor Who specials
Ten European Christmas traditions
Play: Can you spot the litter and save the animals?
What does 'Hothouse Earth' mean?
Why is plastic such a problem?
How well do you know our oceans?
Should crisp packets be plastic-free?
Seabirds too full of plastic to eat food
What is the 'Blue Belt'?
David Harbour keeps 'penguin dance' promise
Why are bees so important?
New beaches named as safe summer swimming spots
New money to protect Great Barrier Reef
Meet the plastic-busting Eco Crew
Worries over plastic rubbish in the Arctic
Kids on a mission to ban plastic straws
The ocean's biggest rubbish dump
Do you want to be 'plastic clever'?
What are the hardest things to recycle?
What's being done to tackle air pollution?
The girls grilling supermarkets about plastic
Artificial light harming planet Earth
Hydrogen: The gas being used to fuel cars
Is climate change making it harder to find 'Nemo'?
World Heritage Sites and the threat of climate change
Tree-mendous wall being built in Africa
Attenborough battles to save butterflies
Trump and the climate change deal explained
How does coral become bleached?
The forest buildings coming to China
What is climate change?
How you're tackling the plastic problem
Molly: All of my troubles go away when I dance
Tyler: Writing gave me my smile back
Elizabeth: I pick up litter to protect our environment
Caitlin: How I learnt to walk again
Ashleigh: I have kidney disease but still don't get out of school work
Ollie: I have had to grow up really fast
Teddy: NHS are the best people in the world
Kane: I don't think being adopted has changed anything
Cara: I speak sign language because my parents are deaf
Josh: I'm living with a brain tumour
Sabrina and Daniel: We saved our Grandma's life
Nasser: How I overcame bullying
Edith: I want to be a farmer when I grow up
Jack: I couldn't talk, but music taught me how
Bethan: I earned friends by being me
Send in the Big Questions you want answered
Why do kangaroos only live Australia?
Why can't dogs chew with their mouths closed?
How does a thunderstorm start?
What was the first ever emoji?
How do we burp?
Why do animals have tails?
Why do we have different colour eyes?
How long would a tortoise take to go around the world?
Why is blood red?
How are clouds made?
Why are some countries hot and others cold?
How far under water do icebergs go?
How old is the universe?
Why can't penguins fly?
Why do we get goosebumps?
Why do volcanoes erupt?
Why do feet smell?
How are bricks made?
How do you count the stars?
Why do onions make you cry?
What was the first dinosaur?
How is a banana a berry but a strawberry isn't?
How big is space?
How are roads named?
How are fireworks made?
Who invented Valentine's Day?
Who invented Lego?
Who invented the selfie?
Can we bring dinosaurs back?
Does the sound of your voice change in space?
How do we predict the weather?
How does carbon dating work?
How is a Formula 1 car different to a family car?
When will we be able to travel at warp speed?
How do you measure a mountain?
What's the fruity difference?