Mars Colonies

Humans first colonized mars in 2030, by 10 scientists; this population grew slowly as underground water was discovered in form of seas, lakes and rivers. Though they have started the process of terra forming Mars, the now population of 30 million live in atmosphere domes and underground. Each settlement/city is connected by an underground tunnel system, using anti-gravity rails to travel quickly to any place on the planet.

The soil on Mars contains large amounts of magnesium, sodium, potassium and chlorine, which is essential for plant growth, so Mars has become one of the biggest producers of produce in the Sol Federation, second (only slightly) to Earth. Mars also has the largest weapons R&D facilities in the Sol Federation.

In 2101, scientists discovered Mars did once have life, the level of life was unknown but only a year later they discovered ruins of a structure under the surface, the structure was made of an unknown metal. Several structures since have been found, but nothing else, no technology, no glyphs, so no one knows who or what built them.