Today, the discussion “Neutrinos, elusive carriers of mysteries of the Universe” has been held at the St. Petersburg International Economic Forum (SPIEF’21). Dmitry Naumov (in person) and Igor Belolaptikov (via videoconferencing) were involved on behalf of our Laboratory. The discussion took place in the area of the exhibition stand of the Ministry of Science and Higher Education of the Russian Federation where the cutting-edge scientific achievements, including the BAIKAL-GVD Deep Underwater Neutrino Telescope, are presented.