It is believed that the fall of a giant asteroidis almost the only culprit in the extinction of the dinosaurs. At the same time, new studies show that formidable vertebrates could almost completely die out even before the fall of the space alien. An analysis of the fossilized shells of that period showed that the Earth was already tense before the impact, because volcanic eruptions heated the oceans for some unknown reason and raised mercury levels to dangerous heights. So what really killed the dinosaurs?
Why did the dinosaurs disappear?
So much talked about nowClimate change of the planet may not occur on Earth for the first time. This conclusion was reached by experts from the University of Michigan, who studied the fossilized shells of ancient mollusks. According to official theory, the collision of the Earth with an asteroid led to a deadly climate change for many species. In addition, the fall of the meteorite raised into the atmosphere a huge amount of dust and stones, which for several years did not let sunlight into the planet's surface, thereby destroying many species of plants. Despite the fact that the hypothesis of a collision of the Earth with a giant asteroid seems to many to be the most preferable, it is not one of a kind. So, according to one version, dinosaurs could be destroyed by massive volcanic eruptions, which began about 66 million years ago and continued for a million years. Volcanic eruptions caused the accumulation of a large amount of carbon dioxide, which ultimately served as the main cause of the extinction of a number of living creatures. However, what caused the eruption of such a force?
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Discovered by scientists from Michigan shells,which became the main evidence of a new version of the mass extinction of living creatures of our planet, contain high levels of mercury, which in itself is a symptom of volcanic eruptions of the past.
According to the portal newatlas.com, fossil shells have been found in Antarctica, USA, Argentina, Sweden and Egypt. Having shown the presence of a large amount of mercury, the shells do not at all refute the fact of the asteroid’s fall as such: the change in the planet’s climate, the eruption of volcanoes, and the fall of the meteorite could greatly affect the habitual life of the planet’s living organisms. And, as you might have guessed, obviously not in the best direction.
Researchers believe that studying found shells can help improve our understanding of ancient - and possibly upcoming - climate change events.
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