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.
However, all known species of penguins live naturally in the southern hemisphere. Contrary to general belief, Penguins do not live only in icy conditions. Outside of Antarctica, Penguins usually inhabit desertic regions and rocky islands where there are not a large number of land predators, so their incapacity to fly is not an issue.