調查人員的結論基於對取自東非大裂谷坦噶尼喀湖底部的一塊距今 6 萬年的沉積物岩芯的分析。坦噶尼喀湖位於東非大裂谷，與蒲隆地、剛果民主共和國、坦尚尼亞和尚比亞接壤，是世界第二深的淡水湖。

Investigators base their conclusion on an analysis of a 60,000-year-old sediment core extracted from the bottom Lake Tanganyika in the East African Rift Valley, which borders Burundi, Democratic Republic of the Congo, Tanzania and Zambia. The lake is the world's second deepest fresh water lake.

Source: Tatoeba