By Jason Arunn Murugesu



NASA/JPL-Caltech
Magnetic fields in the early universe may have shrunk the volume of our galaxy by close to 30 per cent. The compression that causes this shrinking could concentrate a galaxy’s matter in the centre where black holes are often found – which may also help explain why certain black holes can grow so fast.
Sergio Martin-Alvarez at the University of Cambridge in the UK, and his colleagues simulated the effects of these little …