Leptoquarks are hypothetical particles predicted by some theories beyond the Standard Model of particle physics. These particles are believed to be bosons that interact with both leptons (such as electrons and neutrinos) and quarks. Leptoquarks are proposed to mediate interactions between quarks and leptons, and could potentially explain certain phenomena that cannot be fully explained by the Standard Model. Research in leptoquarks involves studying their properties, experimental searches for their existence, and exploring their implications for particle physics and cosmology.