Associate Professor of History of Philosophy Roomet Jakapi (left) and Associate Professor of Theoretical Philosophy Uku Tooming (right), University of Tartu. Photo: Ruth Jürjo / University of Tartu.

Aphantasia Undercuts 300-Year-Old Theory of How We Think

Brain condition challenges David Hume’s claim that abstract thought depends on mental images, forcing philosophers to reconsider how minds handle ideas like justice and geometry.

Alzheimer's sleep habits could impact a woman like this one shown sleeping comfortabley

Hidden Link Between Alzheimer’s and Sleep May Depend on a Single Gene

A large Australian study finds that variants in the AQP4 gene are linked to memory and brain structure in older adults at risk for Alzheimer’s. Sleep quality shaped these effects. Poor sleep worsened brain atrophy and cognitive decline in certain genotypes. The findings point to sleep as a possible way to reduce genetic risk.