April 14, 2018 research Explorability and the origin of network sparsity in living systems Daniel M Busiello, Samir Suweis, Jorge Hidalgo, Amos Maritan Scientific Reports 7: 12323(2017) doi:10.1038/s41598-017-12521-1 Sparsity of interactions in living systems. From Busiello et al., Scientific Report 2017