Robot penguins of the water and air are manufactured by German robotics manufacturer Festo, as well as aquatic and airborn rays (as in the fish). Here's another aquapenguin video from Festo's YouTube channel. These videos are so futuristic they don't seem real. [via, fittingly enough, William Gibson's Twitterfeed]
Cool Antarctica is a site dedicated to all things Antarctic. There are pictures (penguins), videos (including, among much else, an old documentary about Edmund Hillary's and Vivian Fuchs' Transantarctic Expedition), a history section focusing on the famous explorers (e.g. Amundsen, Scott, Shackleton, Charcot and de Gerlache) and a fact file, which includes what may be my favorite section, an Antarctic slang dictionary (degomble: removing snow that's stuck to clothing before going inside - monk-on: a term for being in a bad, usually introspective mood, "he's got a monk-on" - poppy: alcoholic beverage that is chilled with natural Antarctic ice). All this is but a taster of what's on the website.