Write an article based on this "Look at dress and hairstyles in the images. Look for props in the image. Check on different species of plants and animals."
If your image has people in it, their hairstyles and clothing styles can be an indicator of the time period. Take a look at clothing catalogs and photographs with known dates. These can help you narrow down a timeframe for your image. Remember that things like style can be regional, so look for images of people from similar regions or spheres of cultural influence. By the time photography was invented, women's dress was typically more period-specific and evolved faster. If you have a woman in your image, look at her dress and style first, as this may offer a more narrow time frame. Sources like national archives for different nations, the Library of Congress photo collections, and digitized museum archives may be good places to start looking for comparable images. Like dress, props can be a good indicator of the time period. If your image shows an early phone, for example, your image would have to date to after 1878, when the first phone companies were founded and telephones became publicly accessible. Items like bicycles, toys, and cookware can also be great indicators of the time period for an old image. Check online or look through old department store catalogs to help you place specific types and models. This one is a bit trickier than fashion and dress, but certain types of animals or plants can be an indicator of the time period. The Cordoba Fighting Dog, for example, was bred out in favor of the Dogo Argentino by the 1920s. A photo with a dog of that breed, then, would have to come before the 20's. Exotic plants, likewise, can be an indicator of the time period. If you see a plant like a palm tree that seems conspicuously out of place for the presumed time period, search online to see when that plant species was first imported into the area.