Does Atlas Obscura have an app?
https://www.youtube.com/watch?v=w0gatMAPFZc Is Atlas Obscura real?Atlas Obscura is an American-based online magazine and travel company. It was founded in 2009 by author Joshua Foer and documentary...
What is the difference between a camera obscura and camera lucida?
https://www.youtube.com/watch?v=EjqEDdOmbxs What is a camera lucida used for?camera lucida, (Latin: “light chamber”), optical instrument patented in 1806 by William Hyde Wollaston to facilitate accurate sketching...