Upsampling adds more pixels/dots per inch (dpi), but creates blurry images, ugly blocks of color, and high contrast in images. The only way resolution can be improved is by decreasing the image size, or by recapturing the image at a higher quality setting.
Postcrossing is an online project that allows its members to send and receive postcards from all over the world.
Sport stacking. Sport stacking (also known as cup stacking or speed stacking) is an individual and team sport that involves stacking plastic cups in specific sequences in as little time as possible. The cups are specially designed to allow for faster times.