Ancient lakes filled world's biggest desert, but early humans never settled
Researchers found evidence of 55 ancient lakes in Arabia's Empty Quarter. No evidence of human settlement was found.
The Rub' al Khali, Earth's largest continuous sand desert, was not always dry. Between roughly 122,000 and 67,000 years ago, wetter periods created temporary lakes and grasslands across the Arabian Peninsula.
A research team trekked about 1,500 kilometres across the Empty Quarter. The research team investigated 125 locations and found ancient lake deposits at 55 of them.
The research team discovered no traces of human settlement. The reason involved geology.
The desert's central basin did not have knappable stone. This is the raw material ancient humans needed to make tools.
The outer margins had usable stone, but the interior did not. So more than water was needed.
The finding suggests early human migration out of Africa was limited not just by water but by geology itself. Researchers now think stone-tool-dependent populations were limited to specific resource zones.
This created an archipelago of habitable islands scattered across the region.
- 55 of 125 locations
- Ancient lakes found
- 1,500 kilometres
- Distance trekked
- 122,000 to 67,000 years ago
- Time period
- 10 locations
- Sites with stone tools
Why it mattersIt reveals why climate is only part of the story in human prehistory. Geology shapes where people can actually survive.
AustraliaNo direct effect on Australia, but the research method and findings inform how scientists understand ancient human migration patterns worldwide.
✓ Claims checked against the source. checked 15 h ago
