Three needs are famously fundamental to survival: food, water, and shelter. According to new research, ancient humans had at least two of those three needs met by a nearly mile-long lava tube about 77 miles (125 kilometers) north of Medina, Saudi Arabia, for at least 7,000 years.
Three needs are famously fundamental to survival: food, water, and shelter. According to new research, ancient humans had at least two of those three needs met by a nearly mile-long lava tube about 77 miles (125 kilometers) north of Medina, Saudi Arabia, for at least 7,000 years.
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