Every camera embeds information into each image that it captures. This data is called EXIF (or metadata of an image). You can view it by right clicking on an image and viewing its info (probably have to view 'advanced'). Or you open the image in an image editor and pull up the EXIF/Metadata for that image. This image shows that it was taken with a panasonic DMC-TZ5 on December 29th 2008 at 10:41 pm.
