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A 7,000-year-old megalithic structure (c. 5,000 BC) was discovered off the coast of Brittany, France, revealing a 120-meter-long, 3,300-ton wall that was submerged due to sea-level rises.

Historical Topographic Maps - Preserving the Past - USGS.gov Ancient Islands Free Download

on "Ancient Islands" using a particular search engine. A 7,000-year-old megalithic structure (c

Research suggests the earliest settlements in Remote Oceania originated from coastal China, with sites in the Mariana Islands dating back 3,500–3,300 years. 000-year-old megalithic structure (c. 5

Studies in the Pacific show that ancient islanders (e.g., in the Mariana Islands ) adapted to ecological changes over 3,500 years, with significant shifts in pottery and lifestyle occurring between 1500 BC and AD 1000.

(maps) of ancient islands available for download.