Daily briefing: The second X chromosome isn't so silent after all / The maternal X chromosome affects cognition and brain ageing in female mice / RNA's biophysical behavior offers new insights into X chromosome inactivation / Author Correction: Genetic drivers and cellular selection of female mosaic X chromosome loss / The ape Y chromosome evolves extremely rapidly, but the X chromosome is conserved / Autoimmune conditions linked to reactivated X chromosome genes / Why do women have more autoimmune diseases? Study points to X chromosome / Why Do Women Have More Autoimmune Diseases? Study Points to X Chromosome / Why autoimmune disease is more common in women: X chromosome holds clues / Dissecting the structural secrets of the inactive X chromosome