26 Jun 2016

At ... supercomputers on the trail of dark matter is the headline.

At ... earth's magnetic field in the past may have been significantly different than the present one - or this is what is being touted. The study is in the Geophysical Research Letters (June 2016). The thinking ios that earth had multiple poles at some stage and the earth's core was not always solid. That is the theory and the starting point of the study. However, it seems the earth's magnetic field has mostly been pretty much unexciting - apart from one glitch, an anomaly, poorly understood, that goes back to the Neoproterozoic between half and one billion years ago. The study proposes that earth's core became solidified at this time.