AFRICA DESCRIPTION  Africa is the world's second-largest and second most-populous continent, after Asia. At about 30,221,532 km² (11,668,545 mi²) including adjacent islands, it covers 6.0% of the Earth's total surface area, and 20.4% of the total land area.[1] With more than 900,000,000 people (as of 2005)[2] in 61 territories, it accounts for about 14% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, the Suez Canal and the Red Sea to the northeast, the Indian Ocean to the southeast, and the Atlantic Ocean to the west. There are 46 countries including Madagascar, and 53 including all the island groups. The continent is surrounded by the Mediterranean Sea to the north, the Suez Canal and the Red Sea to the northeast, the Indian Ocean to the southeast, and the Atlantic Ocean to the west. It straddles the equator and encompasses numerous climate areas and is the only continent to stretch from the northern temperate to southern temperate zones. Because of the lack of natural regular precipitation and irrigation as well as glaciers or mountain aquifer systems, there is no natural moderating effect on the climate except near the coasts. Africa, particularly central eastern Africa, is widely regarded within the scientific community to be the origin of humans and the Hominidae tree, as evidenced by the discovery of the earliest hominids, as well as later ones that have been dated to around 7 million years ago including Sahelanthropus tchadensis, Africanus, Homo Erectus, with the earliest humans being dated to ca. 200,000 years ago, according to this view. Africa straddles the equator and encompasses numerous climate areas; it is the only continent to stretch from the northern temperate to southern temperate zones. Because of the lack of natural regular precipitation and irrigation as well as glaciers or mountain aquifer systems, there is no natural moderating effect on the climate except near the coasts. Most first-timers aim for the East African nations of Kenya, Tanzania, and Uganda, which have a well developed tourist infrastructure and where you're most likely to spot large numbers of big game. And Tanzania offers an added bonus: world-class views of Mount Kilimanjaro or--for those with the requisite leg and lung power--from its summit. Safari veterans, meanwhile, tend to head south toward Namibia, Zambia, Zimbabwe, Botswana, and South Africa, where the wildlife is less plentiful but your chances of getting right up close are greater. Africa's wildlife is still...wild, and thus are now the setting for thousands of safaris each year especially Namibia safaris, which tend to be a-bit more memorable.