SNOLAB is Canada’s world-leading underground laboratory for particle astrophysics experiments. What are we trying to do there? Detect the invisible: searching for particles of dark matter, measuring the flux of ghostly neutrinos from the Sun and the Earth, trying to observe a most peculiar nuclear decay that might teach us something about the properties of matter and antimatter. In this colloquium, selected highlights of our current research efforts at SNOLAB will be presented.