Technological diversity in the Late Pleistocene of the Nyanza Rift, Kenya: Archaeological excavations at Kapsarok 1 and Anderea’s Farm 1

•Two new Late Pleistocene archaeological excavations from the Nyanza Rift.•High technological diversity in two broadly contemporaneous sites <5 km apart.•Middle Stone Age variability in the Late Pleistocene is likely under-estimated.•Technological differences influenced by original raw material size.•Open-air sites vital for revealing the full range of hunter-gatherer behaviors.