my understanding is that for 'life' to evolve on any planet, that planet needs to have a magnetosphere, to protect those 'lifeforms' from lethal solar radiation. just as ours has, else all life on earth would die off, promptly. thought i'd heard mars has none now , therefore no life now. if it had a magnetosphere, did it collapse as in the on going fusion bomb,(read sun) at its centre, ran out of fuel. how else are magnetospheres formed? my Q to all those solid core advos. have the extra solar planet finders, been able to detect magnos on any planets. probably not . when a planet is formed, the heavy atomic elements are at the centre. when critical masses are achieved, atom fusion, and mag/sph'r. is the logic correct?
i'd have asked prof go-ogle, but shes offline this millenium

i don't think they know enough about how life started or how they can live on other climate conditions to make a statement like that... a guess is all that is

hey you of all here ,should have a handle on the absolute necessity of a electro-magnetic field enveloping your planet .without of which uber lethal doses of solar rad'll destroy any organic chemistry at inception

ok, and what exactly are we going to do about it? i try not to worry about things i have no control over...