Science thinks there was water on Mars

 

Image courtesy of NASA.

Joel Kontinen

NASA’s Perseverance roverR  landed in Jezero crater on Mars in February 2021. Earlier orbital images showed that the crater contains an ancient river delta that was deposited by water flowing into a lake billions of years ago.

Mangold et al. analyzed rover images taken shortly after landing that show distant cliff faces at the edge of the delta. The exposed stratigraphy and sizes of the boulders allowed them to determine the past lake level and water discharge rates. An initially steady flow transitioned into intermittent floods as the planet dried out.

This history of the delta’s geology provides context for the rest of the mission and improves our understanding of Mars’ ancient climate.

Now, Science has included a story of how the discovery was made. They belive that water played a  mayor role in the red planet. 

Source  

Smith. Keith T 2021. Martian Geology Perseverance images of a delta on Mars Science 7 October,