Recent studies on relict eolian dunes in the Rio Negro basin, northern Amazon, Brazil (00°35′N, 63°14′W), indicate a drier climate regime during the Late Pleistocene–Holocene transition that is different from the present humid climate. The eolian sands form long chains of linear dunes bordering the Rio Negro River and some tributaries. Here, we present thermoluminescence (TL) ages spanning the period 32,000–8000 yr B.P. The final dune stabilization took place after 8,000 yr B.P. and now the bases of the dunes are fixed by vegetation. Clustering of the TL dates suggests that the dry climate in the Amazon Basin occurred in distinct episodes and argues against current opinions that drastic ecological changes did not affect in the Amazon during the last global glaciation.

New dating of several key sites in eastern Central Europe refines our view of human presence there around the Last Glacial Maximum. The author shows that, with the advancing Ice Age, this part of Europe was abandoned later than the west, and a critical environmental factor was increasing aridity rather than the dropping temperatures.

AMS and other dating methods have been applied to the problem of Upper Palaeolithic occupation in Central Europe. The results from the excavations at the Rhineland site of Wiesbaden-Igstadt provide an opportunity for comparison and discussion of whether central Europe was really subject to abandonment at various times during Glacial/Pleniglacial episodes.