Good News!

Determining the onset of the terrestrial geodynamo is fundamental in our understanding of the formation of a habitable Earth.  Due to the lack of a >4 Ga rock record, detrital Hadean zircons may hold clues into the presence of a geodynamo on early Earth.  However, these new results suggest that none of the nearly 4000 zircons analyzed in this study show evidence of an Headean-Eoarchean geodynamo and calls into question recent results that showed the contrary.