That is unknown.
It is believed that a meteor strike led to the extinction of dinosaurs
Plesiosaurs went extinct around 66 million years ago, likely due to a combination of factors. The main reason for their extinction is believed to be the mass extinction event that wiped out the dinosaurs, known as the Cretaceous-Paleogene extinction event. This event was likely caused by a massive asteroid impact, volcanic activity, and climate change. These factors led to drastic changes in the environment, including a decrease in food sources and habitat loss, which ultimately contributed to the extinction of the plesiosaurs.
The primary hypothesis is that they were led to extinction by hunting by humans.
Regulated hunting has NEVER led to the extinction of any species.
The reasons for the extinction of australopithecines are not definitively known. Factors such as environmental changes, competition from other hominid species, and potential diseases or natural disasters could have played a role in their extinction. It is likely a combination of these factors that led to their eventual disappearance.
Pullups
Allosaurus lived from 160-145 million years ago (Late Jurassic).
Water and Rock
The extinction of Miocene apes was primarily driven by a combination of climate change and habitat loss. During the late Miocene, significant global cooling and aridification led to the transformation of lush forests into more open savanna environments, reducing the habitat suitable for these apes. Additionally, competition with emerging hominins and other primate species for resources may have further contributed to their decline. These factors combined led to the eventual extinction of many Miocene ape species.
Factors that generally cause mass extinction include natural disasters (such as asteroid impacts or volcanic eruptions), climate change, environmental changes, and human activities like deforestation, pollution, and habitat destruction. These factors can disrupt ecosystems and lead to the widespread extinction of various species.
A meteorite impact that caused plants to cease production of pollen, meaning that flowering plants had shut down, causing a chain reaction up the food chain that eventually led to the extinction of the T-Rex.
What led factors led to President Nixon's victory?