How do you tell how old a picture is?

To determine the age of a picture, you can examine various clues such as the style of clothing, hairstyles, and technology depicted in the image. Additionally, checking for any dates or inscriptions on the back or front of the photo can provide direct information. The type of photographic process used, such as black and white film or digital formats, can also help narrow down the time period. Finally, researching the context or location in which the photo was taken may yield further insights into its age.