A discussion “Neutrinos, the elusive carriers of misteries of the universe” was held on the St. Petersburg International Economic Forum 2021. Dmitry Naumov and Igor Belolaptikov from the Dzhelepov Laboratory of Nuclear Problems participated in the event. The discussion took place on the section of the Ministry of Science and Higher Education of the Russian Federation, which presented the greatest recent scientific achievements. The Baikal Deep Underwater Neutrino Telescope is one of the achievements. The photo belongs to the Ministry of Science and Higher Education.