坦桑尼亚纳特龙湖：石化之湖的科学谜题
Along the shores of Lake Natron in northern Tanzania, dead birds and bats appear frozen in life-like poses, their bodies calcified into stony sculptures. This surreal phenomenon has earned the lake a sinister reputation, but the science behind it is a fascinating tale of extreme chemistry and unexpected life.
Natron is a soda lake, fed by hot springs rich in sodium carbonate. Its water can reach a pH as high as 10.5—nearly as caustic as household ammonia—and temperatures often climb to 60°C. When animals die in the water, the high alkalinity halts decay by stripping moisture from tissues and depositing mineral salts, effectively mummifying them. Over time, the remains become encased in a crust of calcium carbonate.
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