COMEDIAN and TV presenter Dara O'Briain is putting his grey matter to the test at Cheltenham Science Festival this week.
The 41-year-old Irishman, who fronts BBC2's Science Club, said he was delighted to return to the event as a guest director to indulge his passion for the subject.
The festival, which started on Tuesday, runs until Sunday.
■ Buzz at the Festival: Page 13
