Using trial and error, medieval engineers adjusted the trebuchet to make sure its missile hit the castle wall—and destroyed it. NOVA's science game, "Destroy the Castle," is very much like the ...

PETER GINN: Castles ... make sure the wall's absolutely straight. 'Cos if it's not, the tower starts going like that, it'll start going like that. NARRATOR: Most of these medieval tools and ...

Leonardo da Vinci excelled in the fields of art and science ... Now, scientists have uncovered a hidden feature underneath a medieval castle in Milan, Italy, that researchers once could only ...