No evidences of volcanic action have been discovered on Mars. The dusky and reddish areas were regarded by the early observers as respectively seas and lands, but at present it is not believed that there are any bodies of water on the planet. There has never been much doubt expressed that the white areas about the poles represent snow. It will be seen from this brief description Hibbeler - Statics many remarkable resemblances exist between Mars and the Hibbeler - Statics, and there is nothing wonderful in the fact that the question of the habitability of the former has become one of extreme and wide-spread interest, giving rise to the most diverse views, to many extraordinary speculations, and sometimes to regrettably Hibbeler - Statics controversy. The first champion of the habitability of Mars was Sir William Herschel, although even before his time the idea had been suggested.