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.
Quick Answer. All known species of penguins live naturally in the southern hemisphere of the world. They actually occupy habitats which are located on each of the five continents within the southern hemisphere. Continue Reading.