The drought hypothesis is a theory that suggests that the extinction of the dinosaurs, which occurred about 65 million years ago, was caused by a prolonged period of drought and climate change. This hypothesis proposes that the Earth's climate became much drier and arid, causing widespread vegetation loss and a reduction in the amount of water available to support the dinosaurs and other large animals.
According to this theory, the drought conditions caused a decline in the herbivorous dinosaurs' food supply, which in turn led to a decline in the carnivorous dinosaurs that relied on them for food. The lack of water and vegetation also likely caused widespread ecological disruption, making it difficult for many species to adapt and survive.
While the drought hypothesis is one possible explanation for the extinction of the dinosaurs, there are other theories as well, including the impact of a massive asteroid or comet, volcanic eruptions, and other environmental factors. Scientists continue to study the fossil record and other evidence to better understand what caused the end of the dinosaurs' reign.