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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...

This time Russian astronaut Dmitri Yur'yevich Kondrat'yev took pictures of his 2 day long journey to the International Space Station and the photos were published in his blog. There are also two other astronauts in the photos - US astronaut Cady Coleman and Italian astronaut Paolo Nespoli. Dmitri Yur'yevich Kondrat'yev Russian: Дмитрий Юрьевич Кондратьев (born May 25, 1969 in Irkutsk, Russia) is a Russian cosmonaut...

A shipwreck is what remains of a ship that has wrecked, either sunk or beached. Whatever the cause, a sunken ship or a wrecked ship is a physical example of the event: this explains why the two concepts are often overlapping in English. A shipwreck could be called a wreck if the structure is still recognizable or a wreckage if it is not recognizable anymore. The United Nations estimates that there are more than 3 million shipwrecks on the ocean floor...