Had an awesome day in the underground lab yesterday working with PICO colleagues on one of the experiment's chiller systems. It has been almost 2 months since I went underground due to surface demands, so it took some re-acclimation. But as always, it was AMAZING. Working on a dark matter experiment 6800ft under the earth is quite an experience. For most people at SNOLAB, it's every day of their regular job. For the miners in the active mine around us, it's even more incredible.