Marta Felcini is a high energy physicist, currently working on experiments at the Large Hadron Collider (LHC) at CERN, seeking to detect new fundamental particles and interactions. She is interested to search for new, yet undiscovered, physics laws that could address cosmic questions, such as what is the nature of dark matter and the unknown origin of cosmic energies, driving the evolution of the observable universe, at the most fundamental level. The study of elementary particles and their interactions, with high energy collider experiments, together with other experimental, observational and theoretical investigations, allows to advance in the understanding of matter and energy, and what the universe is made of, at the most fundamental level currently accessible.