The role of openings in architecture and how flat roof windows balance light, privacy, and ventilation for healthier spaces.

BOY:We're putting a picture onto the glass window. GIRL:So the light can shine through. CURIOUS CAT:Good thing you have glass windows in the ... so that it's perfectly flat. So what we're gonna ...

Overhead openings, such as skylights and flat roof windows, overcome this challenge ... will last for thousands of years, glass is still one of the most innovative and crucial materials used ...