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Resources are scarce in Lesotho - a consequence of the harsh environment of the highland plateau and limited agricultural space in the lowlands.

But using remote sensing technology, archeologists have now found at least two highland cities that sat along a key crossroad of the trade routes.

Pregnant people living in highland regions who have never had malaria before are worst-positioned to survive the bite of an infected mosquito.

A mortuary practice known as Log Coffin culture characterizes the Iron Age of highland Pang Mapha in northwestern Thailand.

For example, highland herders typically move across zones with rich grass resources toward the more limited arable niches on the plateau.