Louis Pasteur suppressed 'awkward' data because it didn't support the case he was making. George Mendel, the supposed 'founder of genetics' never grasped the fundamental principles of 'Mendelian' genetics. Joseph Lister's famously clean hospital wards were actually notoriously dirty. Drawing on history of science scholarship, Waller shows that many of our greatest heroes of science were less than honest about the experimental data and not above using friends in high places to help get their ideas accepted.