A flock of flamingos flying on Lake Natro, Tanzania. The alkaline water in Lake Natron has a pH as high as 10.5 and is so caustic it can burn the skin and eyes of animals that aren't adapted to it. (Photo/VCG)
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A flock of flamingos flying on Lake Natro, Tanzania. The alkaline water in Lake Natron has a pH as high as 10.5 and is so caustic it can burn the skin and eyes of animals that aren't adapted to it. (Photo/VCG)
