Tag Archive for 'Noachian-Hesperian transition'

This HiRISE image shows a flat top, heavily eroded fluvial sinuous ridge on Mars; sand dunes can be seen migrating over the top of the fluvial sinuous ridge. Image credit: NASA / JPL / University of Arizona.

Mars was Warm and Wet 3.7 Billion Years Ago, New Study Suggests

Jul 14, 2025 by News Staff

Planetary scientists have discovered more than 15,000 km of ancient riverbeds in Noachis Terra, a region in Mars’ southern highlands. This discovery...