The purpose of this article is to investigate a novel phenomenon in which a lighter object can fall faster than a heavier one in a viscous fluid, challenging traditional physics principles. We describe a new analytical approach that compares two spheres of different densities (aluminum and iron) and sizes in a less dense viscous fluid, focusing on the Reynolds numbers less than 1. This methodology allows assessing gravitational, buoyant, and drag forces that impact the spheres' velocities and acceleration, particularly before reaching steady terminal velocities. Our findings reveal that under certain conditions, a denser (but lighter) sphere achieves a higher terminal velocity due to the specific ratios of gravitational force to opposing forces. This study quantitatively illustrates the spheres' trajectories, determining which lands first based on release height, thereby offering insights into the dynamics of objects in viscous fluids. This research is innovative as it introduces a method that quantifiably demonstrates how a denser sphere can outpace a heavier one in a viscous medium, a scenario previously unreported. These results not only challenge conventional beliefs about falling object behavior but also contribute to the broader field of fluid dynamics by providing a new understanding that can be applied to future studies. Keywords: spheres, density, buoyant forces, drag forces, terminal velocities DOI: https://doi.org/10.35741/issn.0258-2724.59.1.16