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Brian Cox goes head to head with fellow superbrain scientist Jeff Forshaw in our science quiz.
Joe tests their physics knowledge to the extreme.
Watch them attempt to explain how things so tiny you can't even see them, like atoms and particles, make up our universe.
Confused? Maybe.
Fascinated? We hope so!
Head-butting dinosaur discovered
A new species of head-butting dinosaur is discovered by scientists in Canada.
'Earth used to smell of rotten eggs'
Scientists studying ancient fossils say they think earth used to smell of rotten eggs.
Climate change 'concerns' UK kids
A poll for kids' charity Unicef suggests that children in the UK are "deeply concerned" about how climate change will affect the world they live in.
Melt creating MORE ice in Antarctica
Dutch scientists say climate change is creating MORE sea ice in Antarctica.
'Urgent need' of climate change fix
The government's chief scientist warns rising levels of carbon dioxide in the atmosphere will cause more floods, droughts and storms over the next 25 years.
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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Science and Nature news facts and quizzes
Video: Tornado disaster in Oklahoma
Why can't penguins fly?
Mr & Mrs Rooney's new arrival
Azerbaijan orders recount
Pakistanis told not to wear socks
