Why were there no tiny dinosaurs? You might blame mammals

Scientists have investigated the reason why tiny dinosaurs did not exist, suggesting that mammals may be responsible for this phenomenon. To explore this, researchers utilized mathematical models to analyze the evolution of body size across various vertebrate groups. This study aims to understand the ecological dynamics and evolutionary pressures that prevented dinosaurs from occupying smaller size niches, while examining how the presence of mammals influenced the overall body size distribution within these prehistoric vertebrate populations.