Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating.
Emperor penguins owe their scientific name (Aptenodytes forsteri) to their discoverer, the first natural scientist to reach Antarctica, the German Johann Reinhold Forster. Forster came to Antarctica in 1770, on Captain James Cook's ship, and saved Cook's life during the voyage.
Penguins of Southern Chile & Argentina. The coasts of southern Chile and Argentina are home to three species of penguin: 1,700,000 pairs of Magellanic Penguin (Spheniscus magellanicus) 250,000 pairs of Southern Rockhopper Penguin (Eudyptes chrysocome) 12,000 pairs of Macaroni Penguin (Eudyptes chrysolophus)