Washington - Astronomers have published their first data from the Mars Pathfinder mission and say it shows the red planet was at one time more like Earth than anyone had imagined.
Water once flowed on its surface, creating boulders, pebbles and sand, it has a molten core similar to but not exactly like Earth's, and it has clouds. A series of reports published in the journal Science review what Pathfinder, and its little roving Sojourner craft, found during four months on Mars.
