Martin takes a flight on the most advanced science plane in the world, which is measuring the amount of pollution in the UK's cities.
It's the GBBO final on Wednesday - and we want to know who you think should win!
MPs have agreed that Heathrow airport should be made bigger - but why is this such a big deal?
Leah has all your top stories on Wednesday.
Australia Post has said sorry for taking half a century to deliver a postcard that was sent from Tahiti to Adelaide
Thousands of people in Mexico have turned out for a Zombie walk.
The camp in Calais in France is one of the biggest migrant and refugee camps in Europe.
Newsround went to meet Alex, whose school is trying to build the fastest foam car in the UK.
Daisy Ridley, who plays Rey in the Star Wars movies, has hinted that her character's parents will be revealed in the next film.
Zoo keepers in China have released footage of a newly born panda cub getting a cuddle off mum.