Imagine our solar system a billion years ago. In those early days, Sun was much cooler than it is now and also less luminous. The two planets Mars and Earth had liquid water on their surfaces on large portions. None of these two was frozen completely at that time as there was enough presence of greenhouse gases and carbon dioxide as well. Both the planets may have had their primitive life forms originating in the young oceans and building the way to a bright future of life.
Both the planets underwent huge dramatic changes in the past some billion years. But for some scientific reasons, Mars died and Earth bloomed. Earth became rich in oxygen, its temperatures were maintained and life exploded on its surface. On the other hand, oceans on Mars disappeared, the atmosphere was lost and the signs of life on Mars are yet not been found there. So, why did Mars die and Earth survive so well? It was a decade long process but scientists have finally figured out the reasons behind this.
Mars doesn’t have any magnetic field and so, it cannot protect itself from solar winds. So, Mars lost its environment whereas Earth didn’t. Earth’s spectacular features include the fact that life on Earth is written on fossil records. From millions of years, various organisms have taken birth on Earth and have left their imprints on the sediments that formed. Of all the sedimentary rocks, limestone is 10%, which have remnants of organisms like amoebas, coral, plankton, algae, etc. while some other creatures consist of silicon, magnesium, etc.
Mars has abundant of iron oxide on its surface which cases its appearance to be of a reddish color. Also, it isn’t dense as the Earth is. So, the color of iron oxide, i.e. rust is seen. Earth shines gloriously bluish due to water on its surface. Most of the Earth is covered with water which reflects blue color through the clouds.