The Final of the competition to select the winners of the Royal Institution trophy - and, this year, additional awards.
Introduced by John Tidmarsh
The four teams of finalists have been asking:
Can we make bumble bees busier? Does the 'chip' have a place in the theatre? How can ox livers help hospitals? Why (and when) are you absent-minded?

The teams:
Bryn Alyn School, Wrexham
The Royal Grammar School, Newcastle
The King's School, Tynemouth
Bexhill College, Sussex

Today they answer questions from:
Dr Mary Archer, Cambridge University
Professor Sir George Porter, The Royal Institution
Professor David Nichols, Exeter University
Professor Colin Blakemore, Oxford University