If your skin is exposed to the sun too much then the harmful UV rays can cause skin damage, leaving it dry and scaly. This is because the UV rays penetrate below the top layer of the skin and affect the collagen which is responsible for the upkeep of the skin. This leads to wrinkles, sagging and also dryness.
A JPG file consists of a sequence of segments, each beginning with a marker, each of which begins with a 0xFF byte followed by a byte indicating what kind of marker it is. Some markers consist of just those two bytes; others are followed by two bytes indicating the length of marker-specific payload data that follows.
The term actually stands for Joint Photographic Experts Group, because that is the name of the committee that developed the format. But you don't have to remember that because even computer nerds will think you're weird if you mention what JPEG stands for. Instead, remember that a JPEG is a compressed image file format. JPEG images are not limited to a certain amount of color, like GIF images are. Therefore, the JPEG format is best for compressing photographic images. So if you see a large, colorful image on the Web, it is most likely a JPEG file.