Dry riverbeds were discovered from probes sent to the planet, along with channels that could only be created from water’s natural erosion of the land over time. Although surface water no longer exists, water ice was discovered by the Mars Phoenix Lander by digging beneath the top most layer of dirt on the Northern Polar Cap and revealed a small pocket of water ice or snow. Scientists are still trying to learn what the source of the past water was, with many theorizing that in the past some areas of ice melted either due to geothermal activity or a meteorite hitting the planet. There is also evidence of rainfall on ancient Mars that riverbeds
Dry riverbeds were discovered from probes sent to the planet, along with channels that could only be created from water’s natural erosion of the land over time. Although surface water no longer exists, water ice was discovered by the Mars Phoenix Lander by digging beneath the top most layer of dirt on the Northern Polar Cap and revealed a small pocket of water ice or snow. Scientists are still trying to learn what the source of the past water was, with many theorizing that in the past some areas of ice melted either due to geothermal activity or a meteorite hitting the planet. There is also evidence of rainfall on ancient Mars that riverbeds