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. 2017 Dec 13;3(12):e1701296. doi: 10.1126/sciadv.1701296

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Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1 — (A) The spatial extent of the Indus Valley Civilization [IVC; ~5300–3300 years before present (yr BP)] is marked by dotted green lines along with the Indus River (brown line). Shading indicates the spatial pattern of JJAS (June to September) rainfall rate (mm/day) from the gridded precipitation data set from the Global Precipitation Climatology Centre Monitoring Product v5 (56). The Sahiya Cave is shown by a black star. (B) Same as (A), except spatial extent of the Early (~3400–3050 yr BP) and Later (~3050–2450 yr BP) Vedic periods are shown. Hexagons depict other cave sites mentioned in the text.