Russian scientists have deployed a giant telescope into the frigid depths of Lake Baikal in southern Siberia to search for the tiniest known particles in the universe. 

The telescope, Baikal-GVD, is designed to search for neutrinos, which are nearly massless subatomic particles with no electrical charge. Neutrinos are everywhere, but they interact so weakly with the forces around them that they’re hugely challenging to detect.