Prominent among the family Ursidae is a polar bear that is adapted to a highly specialized semi-aquatic lifestyle. Although it is a bear yet it is listed as a marine mammal precisely due to the fact that it spends 50% of its life on ice floes and is able to swim as far as 90 km (60 miles).
urchin. 1  a mischievous boy. 2  any small boy or youngster. 3  sea urchin. 4  either of two small rollers covered with card clothing used in conjunction with the cylinder in carding. 5  Chiefly British Dialect. a hedgehog. 6  Obsolete. an elf or mischievous sprite.
Gout is a metabolic disorder which causes inflammation of the joints. In acute cases, some joints swell up within just a few hours and become very sensitive to pain. The inflammation is triggered by tiny needle-shaped crystals of uric acid that build up mostly in the joints.urines are mainly produced inside the body, but they are also found in many different types of foods. Fish, meat and seafood are especially rich in purines. People with gout are sometimes advised to stick to a strict low-purine diet.