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Scientists are still looking for a theory to explain he death of the dinosaurs.
Especially something that explains why it happened so quickly, over such a large area.
One of the theories is based on volcanic eruptions.
The most dangerous eruption of modern times was in 1815.
Mount Tambora, a volcano in Indonesia, shot out fifty cubic kilometers of ash.
Some of this ash went straight up for forty-three kilometers.
The sun was partly blocked and the entire world cooled by as much as 3°C.
A year after the eruption, parts of Europe and North America were so much colder, that it was known as the year without summer.
Less sunlight reached the Earth and ash covering plants meant food crops could not grow.
About ninety-two thousand people died, most from starvation.
Volcanoes can kill in other ways.
They can produce gasses that choke people.
Some volcanoes cause earthquakes and giant tidal waves.
Sometimes a volcano’s lava and ash buries an entire city.
Volcanologists (scientists who study the eruptions of volcanoes) are specifically interested in the impact of ash blocking the sun and lowering global temperatures.
They wonder how this might have affected dinosaurs worldwide and how it might one day affect us.
This happens not only from the volcano itself, but also from the smoke of the forest fires it starts.
What would happed if there were thousands of major volcanic eruptions at the same time?
The world would become colder and the air would become unbreathable. Dinosaurs and sea creatures would die.
Was this how the Dinosaurs died?
Another leading theory has to do with a large meteorite striking the Earth, sending up dust, and starting forest fires and tidal waves.
Such a meteorite may even have started a chain of volcanic eruptions, causing incalculable damage.
But, whatever killed the dinosaurs, we still don't understand why some species, such as frogs, survived.
Especially something that explains why it happened so quickly, over such a large area.
One of the theories is based on volcanic eruptions.
The most dangerous eruption of modern times was in 1815.
Mount Tambora, a volcano in Indonesia, shot out fifty cubic kilometers of ash.
Some of this ash went straight up for forty-three kilometers.
The sun was partly blocked and the entire world cooled by as much as 3°C.
A year after the eruption, parts of Europe and North America were so much colder, that it was known as the year without summer.
Less sunlight reached the Earth and ash covering plants meant food crops could not grow.
About ninety-two thousand people died, most from starvation.
Volcanoes can kill in other ways.
They can produce gasses that choke people.
Some volcanoes cause earthquakes and giant tidal waves.
Sometimes a volcano’s lava and ash buries an entire city.
Volcanologists (scientists who study the eruptions of volcanoes) are specifically interested in the impact of ash blocking the sun and lowering global temperatures.
They wonder how this might have affected dinosaurs worldwide and how it might one day affect us.
This happens not only from the volcano itself, but also from the smoke of the forest fires it starts.
What would happed if there were thousands of major volcanic eruptions at the same time?
The world would become colder and the air would become unbreathable. Dinosaurs and sea creatures would die.
Was this how the Dinosaurs died?
Another leading theory has to do with a large meteorite striking the Earth, sending up dust, and starting forest fires and tidal waves.
Such a meteorite may even have started a chain of volcanic eruptions, causing incalculable damage.
But, whatever killed the dinosaurs, we still don't understand why some species, such as frogs, survived.
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