o recognition.?The majority of the continent and its countries are in the Northern Hemisphere, with a small portion and number of countries in the Southern Hemisphere.РGeneral Introduction to AfricaРAfrica's average population is the youngest amongst all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4.?Algeria (阿尔及利亚) is Africa‘s largest country by area, and Nigeria (尼日利亚) is its largest by population. ?Africa, particularly central Eastern Africa (e.g. Ethiopia埃塞俄比亚), is widely accepted as the place of origin of humans (Homo sapiens).РLucy, an Australo`pithecus `afarensis (南方古猿阿法种) skeleton discovered on 24th November 1974 in the Awash Valley of Ethiopia’s Afar Depression (1974年考古学家在埃塞俄比亚阿法尔地区的阿瓦什河谷发现了露西。她生活的年代是320万年之前,因此被认为是第一个直立行走的人类,是目前所知人类的最早祖先。)
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