  The Experiment to Detect the Global Epoch of Reionisation Signature (EDGES)
collaboration has recently reported an important result related to the
absorption signal in the Cosmic Microwave Background radiation spectrum. This
signal corresponds to the red-shifted 21-cm line at $z \simeq 17.2$, whose
amplitude is about twice the expected value. This represents a deviation of
approximately $3.8\sigma$ from the predictions of the standard model of
cosmology, i.e. the $\Lambda$CDM model. This opens a window for testing new
physics beyond both the standard model of particle physics and the $\Lambda$CDM
model. In this work, we explore the possibility of explaining the EDGES anomaly
in terms of modified dispersion relations. The latter are typically induced in
unified theories and theories of quantum gravity, such as String/M-theories and
Loop Quantum Gravity. These modified dispersion relations affect the density of
states per unit volume and thus the thermal spectrum of the Cosmic Microwave
Background photons. The temperature of the 21-cm brightness temperature is
modified accordingly giving a potential explanation of the EDGES anomaly.
