Jezero crater: Inside Mars great river delta - where Perseverance will land
Why has NASA chosen the Jezero Crater? Experts believe the Jezero Crater was once flooded with water - and if Earth is anything to go by, where there is water there is life. NASA said the area has been flooded, and dried out, on several occasions over Mars' history, with water being there for billions of years. However, as the Martian climate warmed, the water dried out, and the area now matches the rest of Mars' dusty surface. Nonetheless, scientists hope there will be traces of extinct life - likely in microbial form - which could prove that genesis is not isolated to Earth alone.