A Paradox of Scales (IMAGE) Washington University in St. Louis Caption New research suggests that mechanisms operating over tiny scales are responsible for the global gradient in biodiversity. Shown here, riotously diverse canopy of Amazonian forest at Los Amigos Biological Station, Peru Credit Jonathan Myers Usage Restrictions Please credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.