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.
Unlike most other penguins, the Little Penguin does not inhabit the continent of Antarctica. Instead, they are found on Australia's southern coast and on the shorelines of New Zealand (also, some parts of Africa and South America), where the temperatures are warmer and the climate not as harsh.