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.
Penguin colonies can consist of tens of thousands of birds, with the largest known colony on St Croix Island near Port Elizabeth, South Africa, numbering 50,000. 8. A penguinâs eyes work just as well underwater as they do above ground. A penguinâs eyesight is very sharp, and works just as well underwater as it does in the air. Because penguins eat a wide variety of undersea prey â including fish, krill, and molluscs â this trait enables them to find food more easily, even in dark, cloudy, or murky water.