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Jae Jae the Sumatran tiger has travelled nearly 4,000 miles from Ohio in the US to meet his new mate, Melati, at London Zoo.
Sumatran tigers are among the most endangered species in the world with around 300 left in the wild.
Keepers at the zoo hope Jae Jae will breed with Melati, a female from Australia, to help save the critically endangered species.
Both tigers are around four years old and both have been bred in captivity.
24 hour protection for Crane egg
A round the clock watch has been set up to protect a rare birds egg laid in England.
Fast pigeon sold for record price
A Belgian racing pigeon called Bolt is sold to a Chinese businessman for a world record price of 310,000 euros (£260,000; $400,000).
Quiz: Fantastic animal facts!
Try our fantastic animal facts quiz with fun questions and answers for kids. It's free!
Why can't penguins fly?
Researchers think they have solved the puzzle of the flight-less birds.
New vaccine to protect animals
British farmers will be the first in Europe to get a new drug to help protect their animals from Schmallenberg disease.
Watch Newsround
Watch the latest update from Newsround, CBBC's news programme for children.
Video: Piglet has been adopted by a cat
A piglet has been adopted by a cat after its mum rejected him.
David Beckham's career in pictures
David Beckham joins Paris St-Germain until June 2013, before retiring from footie - Newsround looks at the former England captain's career in pictures.
New Game: Play our new Reporter Rush game
Send your reporters to the news in time with Newsround's new game Reporter Rush
New Game: Grab the controls and try Master Control Room
Be a live Newsround editor for the week with our new game Master Control Room
Video: The week's weirdest online clips
Newsround takes a look at the top three weirdest news stories of the week.
Quiz: The week's news headlines
How much can you remember about the past week's biggest news stories? Find out with Newsround's Quiz of the Week!
All about our Inventions Competition
Dick and Dom have teamed up with Newsround to launch an exciting inventions competition. We want kids to dream up inventions that solve everyday problems.
Watch Newsround's special programmes
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