ocr: Zimbabwe, on Lake Kariba. Until the 1950s this lake had been a deep gorge, where the Tonga people thrived. But a dam, finished in 1960, turned Kariba Gorge into al lake, with houseboats and ferries bobbing on its surface, and crocodiles- 1 notoriously dangerous number of them- gliding just beneath. Downstream from the dam, which generates power for much of Zimbabwe and Zambia, glided in my canoe for a whole glorious day, accompanied by flights of birds reed cormorants, darters, oxpeckers, The hippos in the channel snuflled und blew; some tiger fish jumped completely clear of the river. Baboons ...