Scientists have identified iron (Fe), the sixth most adundant chemical element in the universe, all over the surface of Mars. Iron is one of the heaviest elements which do not require a Supernova for their creation. Scientists recognize that Mars is accreting mass, as all astronomical bodies must do because of gravity, (in the form of iron) from meteorites, thus growing. The New Scientist: Mars iron is ideal for building future bases.
FUTURE colonisers of Mars needn't worry about lugging materials from Earth to build their bases - the most widely used building material on Earth, steel, could be manufactured on the Red Planet.They also say mass accretion contributed to Mars's unique magnetic field: Giant impact explains Mars's wonky magnetic field.
The rover Opportunity has found elemental iron - a key ingredient of steel - peppered across the Martian surface as a result of collisions with iron-rich meteorites.
The strange magnetic field of Mars, which is concentrated in the planet's southern hemisphere, could have been caused by a giant impact.And Mars was decapitated (and killed?) by the biggest impact in the system: Almighty smash left record crater on Mars.
The finding clears up one of the biggest remaining mysteries about the planet.
The study, led by Sabine Stanley of the University of Toronto, has shown that the asymmetric field could be linked to the planet's strange surface features.
The relatively smooth, flat surface of Mars' northern hemisphere lies around 6 kilometres lower than the more mountainous surface of the southern hemisphere. Earlier this year, researchers proposed that this "Mars dichotomy" can be explained if a huge object, almost as big as Earth's moon, hit the northern hemisphere of Mars at a shallow angle.
It has long been known that the planet's oddly shaped magnetic field – first observed by the Mars Global Surveyor in 1985 – originated about the same time as the Mars dichotomy.
EVERY scar tells a story, yet a huge gash on Mars has long proven very hard to read. Now a peek beneath the planet's surface reveals that the scar is the largest known impact structure in the solar system - gouged out by a collision that reshaped the Red Planet."My research, based on irrefutable evidence of constant accretion of meteorites and meteor dust, concludes that Earth began as an asteroid remnant of an earlier comet captured by the Sun. The proto-planet then grew over uncountable years (possibly many more than the 4.5 Ga now believed) in an accretion process that is still underway and will continue into the future at an accelerating pace because of Earth’s constantly increasing mass and gravitational power." -- Lawrence S. Myers, cryptologist/geoscientist, 2005