1- The stratosphere is steady, stable and relatively calm, so its constituent gases have been separated into seven gaseous layers .. according to the specific weight of each gas.
It is stable because its lower part is colder (about - 60 centigrade) and it gets hotter as one goes up until it is hottest (about zero centigrade) in its top sub-layer.
2- The Global Warmth is almost because the earth has become somewhat nearer to the sun ... and therefore, the heat has increased all over the earth .. the cold regions became less cold and the hot regions became more hot.
Other factors like the greenhouse effect may be of less importance.
3- There is life on Mars:
Mars and the planets farther than it bear life in all its forms including man-kind and genie-kind, in addition to plants and animals.
4- Origin of the earth and the planets:
The planets together with the earth had been one sun which then converted into an earth with thin crust then burst into nine pieces -> leading to the formation of the earth and the planets which circled around the nearest sun to them, which was our present sun --> so that a new solar system: the present one issued.