UVA was recognized by Science as leading two of the top 10 scientific discoveries in the world in 2015. The first breakthrough was when UVA School of Medicine researchers Jonathan Kipnis and Antoine Louveau discovered previously unknown vessels connecting the human brain directly to the lymphatic system. The second breakthrough was when UVA psychology professor Brian Nosek examined the reproducibility of 100 psychology studies and found fewer than half could be reproduced. More than 270 researchers on five continents were involved, and twenty-two students and faculty from UVA were listed as co-authors on the scientific paper.