Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating.
Emperor penguin - Aptenodytes forsteri. This is the largest species of penguins. Emperor penguins are only found on and around the Antarctic continent, on the thick pack ice and rarely on mainland. They have a pale yellow, open (breast and chin patch are one) patch on chin and breast. A long, thin and curved bill, typical for fish eaters. Very dark grey back and blue black head.
Although all penguin species are native to the Southern Hemisphere, they are not found only in cold climates, such as Antarctica.In fact, only a few species of penguin live so far south. Several species are found in the temperate zone, and one species, the Galapagos galÃ¡pagos, penguin lives near the. equatornstead, adult penguins are at risk at sea from predators such as sharks, the orca, and the leopard seal. Typically, penguins do not approach closer than about 3 meters (9.8 feet) at which point they become nervous.