Lying at the Horn of Africa, Ethiopia is a large temperate country with total surface area of 1.12 million square kilometers inhabited by 65 million people. The country's recorded history dates back more than 3,000 years to the time of Axumite Empire which prevailed until the 8th century. In recent times, archaeological excavations in the valley of the River Omo, west of the Rift Valley, have revealed human occupation pre-dating the remains at Olduvai in Tanzania.
The northeast-trending Rift Valley, with its associated escarpments, and numerous lakes in the southern sector, runs through the center of the country and ranges in width from 40-60 km. It is the dominant physical feature. To the west, its steep escarpments give way to well-watered high plateaus generally above 2,000 m in elevation, incised by steep and spectacular gorges draining west into the Nile river system. In eastern Ethiopia, there are low-lying pastoral areas prone to drought and in the far north, where the elevation dips to below sea-level in part of the Dallol Depression, arid conditions prevail.
The county's physical diversity has produced a varied climate. On the plateaus, the climate is temperate and contrasts with the hot lowlands but in the far southwest of the plateau region, higher rainfall and lower elevation have given rise to extensive rain forest. The majority of the population, around 70%, live on the plateaus (which are largely free of the material mosquito), and follow agricultural pursuits. It is widely recognized that the origin of coffee is from Keffa in southern Ethiopia where it was first found.