Mars Global Surveyor; Magnetic Field Experiment

This is a press release done in 2005 and is found on the NASA website. It discusses investigations done by NASA to establish if Mars has a magnetic field and if it does, what the nature of it is. The results of this investigation were that Mars does not have a current magnetic field but that it used to have one about 3.5 billion years ago. Also, they found that much of the current state of Mar's atmosphere and climate are a direct result of this loss.