Lydgate, Anthony «Catching dust - A changing NASA visits an asteriod, seeking the key to life's beginning» (en anglès). The New Yorker, 23-09-2016 [Consulta: 23 maig 2021]. «[The ancient Egyptians believed that] [u]pon the mound stood the sun god Atum, who summoned the cosmos into being […] Atum had two children, who had two children of their own: Geb, the earth, and Nut, the sky.»