Even if a direct causal link is not found between this event and the decline of the Indus Civilization, the fact remains that the two phenomena coincide remarkably well. Unlike other cultures,
the Indus Civilization was capable of building metropolises, and spanned parts of northern India and most of modern-day Pakistan. The conclusions in this new study may suggest that climate change
is one of the main reasons why many large, ancient cities fell into ruin. The presence of the weak monsoon was determined through an in-depth analysis of snail shells found inside sediments at
the bottom of an ancient lake. Cambridge investigators analyzed the amount and type of oxygen isotopes in these shells in order establish weather conditions at the time. This is one of the first
pieces of evidence supporting the older hypothesis that climate change may have had a hand in the decline of the Indus Civilization and its major cities. Furthermore, the work supports an idea
which argues that a global climate change event occurred on Earth during the Bronze Age.
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