Light from nearly 4m galaxies measured as it twisted and travelled through intergalactic space Follow our Australia news live blog for latest updates Get our breaking news email , free app or daily news podcast A cosmic map of magnetic fields – the largest ever produced – could help scientists delve into one of the major and most mysterious forces in the universe. A global team led by Australia’s national science agency, the CSIRO charted the magnetic fields by measuring light from nearly 4m gal