What you'll need: Estimated time: 20 minutes (or five minutes if you're not using paint) A camera obscura works in a similar way to the lens in your eyes, which means that images are projected ...

This story appears in the May 2011 issue of National Geographic magazine. Something strange and wonderful happens when light enters a dark space through a tiny opening. Aristotle described the ...

His works combine intentional decisions with ... as much light as possible because he makes photographs using a “camera obscura” — literally, a dark room. The earliest written account ...