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Photography in the 21st century is as effortless as pointing a phone and tapping. A person can take a seemingly infinite number of shots of cats scrunched in boxes, dinners at new restaurants, or views out airplane windows and then immediately share them on social media, flooding the feeds of followers. But at its beginning—before selfies, Instagram filters, and viral memes—photography was much slower and sometimes cumbersome. Here are 12 key dates that got us...