It is believed that the fall of a giant asteroid is the only culprit for the extinction of the dinosaurs. At the same time, new studies show that impressive vertebrates could almost completely become extinct before the fall of the alien. An analysis of the fossilized shells of that time showed that the earth was already tense before the impact because volcanic eruptions heated the oceans for unknown reasons and increased the mercury content to dangerous heights. What really killed the dinosaurs?
Why did the dinosaurs disappear?
The climate change that is currently being discussed so often on the planet may not be the first time on earth. This is the conclusion reached by experts from the University of Michigan who examined the fossilized shell of ancient molluscs. According to official theory, the collision of the earth with an asteroid led to fatal climate change in many species. In addition, the fall of the meteorite has thrown a large amount of dust and stones into the atmosphere, which for several years did not allow sunlight into the surface of the planet and destroyed so many plant species. Although the hypothesis of an Earth's collision with a giant asteroid seems to be the most preferable to many, it is not unique. According to one version, dinosaurs could be destroyed by massive volcanic eruptions that started about 66 million years ago and lasted for a million years. Volcanic eruptions accumulated a large amount of carbon dioxide, which was ultimately the main cause of the extinction of a number of living things. But what caused the outbreak of such a force?
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Shells discovered by Michigan scientists and which have become the main evidence of a new version of the mass extinction of living beings on our planet contain a high level of mercury, which in itself is a symptom of past volcanic eruptions.
According to newatlas.com, fossil shells have been found in Antarctica, the United States, Argentina, Sweden and Egypt. After detecting a large amount of mercury, the mussels by no means disprove the fact that the asteroid as such has fallen: a change in the planet's climate, a volcanic eruption and a meteorite fall could significantly affect the habitual life of the living organisms on the planet. And, as you may have guessed, obviously not in the best direction.
The researchers believe that studying mussels found can help improve understanding of old and potentially upcoming climate change events.
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