When Mammals Only Went Out At Night

The video explores the evolution of vertebrate eyes, focusing on the nocturnal bottleneck hypothesis, which suggests that early mammals retained nocturnal traits due to their survival strategies during the dinosaur era. Genetic and fossil evidence supports this hypothesis, showing that early mammals were small and nocturnal. However, new findings challenge the simplicity of this narrative, revealing that some dinosaurs were also active at night. The extinction of dinosaurs led to significant evolutionary changes in mammals, including increased body size and diurnality. The video highlights the complexity of mammalian and dinosaur evolution.

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