On February 18, 2021, NASA's Mars 2020 mission's Perseverance rover landed on the floor of Jezero crater.
The rover was designed to characterise the geology, investigate past climate records, and search for evidence of possible ancient life.
The multi-year mission aims to select, collect, and document approximately 35 rock and soil samples.
The crater was created by an impact on an early Noachian surface with Isidis impact deposits.
It later became an open basin lake, fed by a vast network of river valleys active between 3.8 and 3.2 billion years ago.
They discovered that the crater floor is made up of igneous rocks that have been altered by water.
The rover collected core samples of these rocks, which are now being stored aboard Perseverance in preparation for a possible return to Earth.