  Nuclear saturation is a crucial feature in nuclear physics that plays a
fundamental role in understanding various nuclear phenomena, ranging from
properties of finite nuclei to those of neutron stars. However, a proper
description of nuclear saturation is highly nontrivial in modern
nonrelativistic~\textit{ab initio}~studies because of the elusive three-body
forces. In this letter, we calculate the equation of state for nuclear matter
in the relativistic Brueckner-Hartree-Fock framework with the leading order
covariant chiral nuclear force. We show that a simultaneous description of the
nucleon-nucleon scattering data and the saturation of the symmetric nuclear
matter can be achieved. In this regard, the relativistic effects nicely explain
the saturation of nuclear matter. As a result, the present study provides a new
perspective on one of the most salient features in nuclear physics.

Nuclear Theory;High Energy Physics - Phenomenology;Nuclear Experiment