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.
Habitat Wildebeests live in Africa. They can be found from Kenya to South Africa, living in woodlands and grasslands. They eat mainly grass and other smaller vegetation. Grasslands are drier areas that have, as the name implies, a lot of grass and woody plants.One type of grassland common in Africa is the savanna. Many wildebeests can be found grazing there. Woodlands are areas filled with trees so close that they can form a canopy.hysical Description Many people find wildebeests to be odd looking creatures. They have horns and hindquarters similar to that of antelopes, yet a face, mane, and tail that look a lot like those of horses. Because of their odd physical appearance, they were called âwild beastâ or, in Afrikaans, wildebeest.