Show gardund GROUND FROZEN AGES AGO scientific explanations of fact which has P puzzled led miners who have worked in alaska I 1 Is miners liners and geologists familiar with nith conditions in alaska are aware that in many places the g ground round in that country Is y frozen except on the surface to a depth of aud and even feet while tills this has bas been popularly attributed to long continued low temperature in winter the interesting theory has recently boon been advanced by a scientist that the conditi condition om Is due to far colder weather that obtained in some previous age and that protective vegetation on the surface lias has kept the frost in the ground permanently permanent ly since then it has been found that when moss lias has been cleared imay away tor for open cut mining or farming the upper level of the rounds grounds frost seemed gradually to descend d it such Is the case cac it may show that present temperatures are not low enough to freeze the ground to the great depths cited above popular ul mechanics magazine |