A recent announcement from the Experiment to Detect the Global Epoch of Reionization Signature (EDGES) [1], published in Nature on March 1st, 2018, has caught the attention of the cosmology and particle physics community worldwide. The EDGES collaboration has announced an observation based on a measurement of the 21-centimeter (21cm) hyperfine transition in neutral hydrogen that calls into question the legitimacy of the Lambda Cold Dark Matter model (ΛCDM), a theory that treats the entirety of dark matter as cold and non-interacting, and has been held in high regard for accurately modeling current cosmological observations over a huge range of scales.

One possible solution to the Dark Matter puzzle is the extension of the Standard Model of particle physics by sterile neutrinos, which, unlike the known neutrinos, do not interact via the fundamental forces of the Standard Model, they only interact gravitationally. Sterile neutrinos represent a natural extension to the Standard Model and feature in various neutrino mass generation mechanism