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.
Almost as famous as their plus-sized cousins are king penguins, a species that breeds primarily on islands north of the Antarctic continent including the Falkland Islands, South Georgia Island and Tierra del Fuego. The coasts of Australia and New Zealand are where youâll find the most petite of the 17 species of penguins.