Mars's split personality extends to its deep interior, study finds

A new study in Nature reveals that Mars's northern and southern hemispheres differ not just in surface features but also in mantle temperature, with the south being 200–400 degrees Celsius hotter. This thermal anomaly may explain the planet's crustal dichotomy, where the northern plains are low and smooth while the southern highlands are rugged and elevated. The findings have implications for understanding Mars's ancient habitability and geological history.