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.
MAGELLANIC PENGUINS are found around the Atlantic and Pacific coasts of Chile, Argentina and the Falkland Islands, reaching as far north as Peninsula Valdez in Argentina, and Puerto Montt in Chile. Together they comprise a world population of around 1,800,000 breeding pairs.