Amongst the doomladen scenarios TV disaster documentaries present for our alarm few speak of the only one that is scientifically verifiable and that is the weakening of the earth's magnetic field. A lot of serious scientific work is being done on this and why the environmentalists have not grabbed onto to this most serious of threats leaves me puzzled. As the title of this thread indicates we know what happens when a small rocky planet near the sun experiences a serious loss of its magnetic field. It becomes Mars. Its suggested that the earths magnetic field is powered by a colossal 'nuclear reactor' at the center of the earth fueled by natural uranium that settled there by virtue of its density. Well nuclear fuels have a half life and the earth is mighty old. Could our reactor be running short of fuel? Will our magnetic field weaken and wither away long before our sun vaporizes our world? Could be and it could happen soon but why are not the leftist lemmings sounding the alarm? My guess is because there is no profit or political power to be gained by beating this drum. As man is helpless to affect the earth's magnetic field and as no taxes or laws can be passed to mitigate ' magnetic erosion' the leftist shrugs and sees no point in forming activist groups to publicize this lethal threat to our existance.