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.
The eastern rockhopper penguin breeds on Prince Edward Island and the Marion Islands in South Africa, the Crozet Islands and Kerguelen Islands in the French Southern Territories, Australiaâs Heard and Macquarie islands, and the Antipodes Islands and Campbell and Auckland islands in New Zealand.