[[1]] chose to live in natural caves because they provided shelter from the rain, heat and wind.

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People chose to live in natural caves because they provided shelter from the rain, heat and wind.
People used to travel between the continents in the distant past. Travel was occasionally challenging but never impossible due to natural obstacles like hills and rivers. Men and women travelled in pursuit of work and later to flee from calamities caused by nature, such as floods or droughts. Soldiers travelled to take over new lands, and traders travelled with caravans to transact business. Holy men travelled from village to village, teaching the populace about spiritual matters. Adventurers who desired to discover new areas with a spirit of exploration were the folks who travelled the most. The constant movement facilitated the exchange of new knowledge and ideas. People learned about the new cultures, and better understood the varied communities.

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