Mars had massive river systems, says new study
A new study has uncovered huge ancient river networks on Mars, suggesting the planet was once much wetter and more Earth-like than we thought.
Researchers mapped 19 clusters of valleys and lakes, which point to long-lasting water flow and a complex global water cycle.
What does this change about Mars?
Using multiple datasets and satellite imagery, scientists found these rivers account for significant sediment shaped by flowing water.
That means water stuck around for ages and really shaped the surface.
Why does it matter now?
These findings flip earlier ideas that Mars was mostly cold and dry.
Instead, it looks like there were stable, wet conditions—raising hopes that life could have existed there.
Could there have been life?
The sediment left behind by these rivers may have carried nutrients needed for life.
So if we want to find signs of ancient Martian life, these spots are prime places to look in future missions.