Why Water Moves, and What It Teaches Us About Migration

Nasa article Waters on the solar system planet

https://environmentalmigration.iom.int/migration-and-water

'We don’t often think of water as something that migrates. But it does. It always has. Across landscapes, through time, and even across planets.

Chemical markers in our oceans suggest that most of Earth’s water came from space. Likely from asteroids and comets, long before life began. And Earth isn’t the only place with water. Venus may have once had oceans. Mars had rivers and a magnetic field that protected its atmosphere. When that field collapsed, the water began to disappear. Today, only about 13 percent remains, mostly frozen or buried.On the moons of Jupiter and Saturn, oceans still exist. They are hidden beneath thick ice on Europa, Ganymede, Enceladus, and Titan. These oceans are dark, pressurized, and sealed off, but they are there.

On Earth, water is visible and in motion. But its presence is no longer guaranteed. In some places, there is too much of it. In others, not enough. Drought and flooding are reshaping entire regions, forcing people to move. Migration is no longer only about borders. It is about water. And not all movement is dramatic. Sometimes, it begins quietly. A shift in temperature. A change in chemistry. A body, plant, or person no longer fits where it used to.

Maybe migration is not always a crisis. Maybe it is the story of something trying to grow somewhere new.'