Molten surface on Mars

For about 100 million years the surface of Mars was covered in molten rock. Scientist in Huston, Texas, UC Davis, and NASA's Johnson Space Center have found this information out just rescently. According to a professor at UC Davis the solar system dates back to 4,567,000,000 years ago. Mars' metallic core just formed a few million years soon after that. Mars used to have a thick enough atmosphere to insulate the planet because the magma ocean on Mars was there for 100 million years. The scientist have been studying the meteroites that have fallen from space to Earth. These types of meteorites have been called shergottites and have shown volcanic activies in Mars between 470 million years and 165 million years ago. By measuring the isotope ratios in the meteroites, scientist have calculated the age of the metorites. They found that planets form in three stages. Dust collects into objects tens of miles across, then gravity pulls these objects into bigger objects in sizes similar to our moon. Then these small planets collide to make three or four larger terrestrial planets such as earth.