Ice ages were not as dry as we thought, according to surprising new Australian cave study.

A new study published in Nature challenges the long-held belief that ice ages were dry periods. The research, based on the analysis of mineral deposits in Australian caves, reveals that ice ages were actually wetter than previously thought, at least in the subtropical regions of the southern hemisphere. The study also found that glacial periods were consistently wetter and cooler, while interglacial periods were consistently drier. This new understanding of ice-age environments in the southern hemisphere calls for a paradigm shift in how we interpret the movement and expansion of plants, animals, and humans in the past. [Extracted from the article]