In the AthenaNugget #22, Franco Vazza, Stefano Ettori and Chiara Ferrari write about the synergy between Athena and the Square Kilometer Array (SKA) to find the expected missing baryons, by detecting the most diffuse gas phase located within the filaments of the Cosmic Web.

The following video, created by Franco Vazza and Claudio Gheller,  shows a simulation of this rarefied gas and how Athena and SKA will observe it.