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A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...

Tree houses, treehouses, or tree forts, are buildings constructed among the branches, around or next to the trunk of one or more mature trees, and are raised above the ground. Tree houses can be used for recreation, work space, habitation, observation platforms, or as temporary retreats. Shelter Tree houses are an option for building eco-friendly houses in remote forest areas, because they do not require a clearing of a certain area of forest...

Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth. Although it has only one-eighth the average density of Earth, with its larger volume Saturn is just over 95 times more massive. Saturn is named after the Roman god of agriculture; its astronomical symbol (♄) represents the god's sickle...