SCIENTIFIC JOURNALS exist to do one factor: present correct, peer-reviewed experiences of recent analysis to an viewers. However based on a paper revealed in PNAS on August 4th, that lofty aim is badly compromised. Scientific fraud, its authors conclude, occurs on an enormous scale and is rising rapidly. Actually, although the variety of scientific articles doubles each 15 years or so, the quantity regarded as fraudulent is doubling each 1.5 years (see chart).