How And What Killed Dinosaurs?

"Dinosaurs were once the rulers of the Earth, but what killed the dinosaurs? Read on and find out different theories on what killed dinosaurs."

The extinction of the dinosaurs remains one of the most intriguing mysteries in the history of science. The fossil record indicates that this extinction event occurred over a relatively short period – roughly 65 million years ago. Also, it was dramatic enough to eliminate more than 75% of all species on Earth.

There have been many theories about what caused this mass extinction, but no consensus has emerged. The most widely accepted theory is that an asteroid impact caused a global firestorm that killed off animals across the planet. However, some researchers have argued that climate change brought on by volcanic eruptions or changes in sea level could have triggered such an event. Let’s discuss what may have killed dinosaurs and what caused the mass exodus.

Dinosaur Extinction

Asteroid Impact?

It is said that the asteroid that killed dinosaurs was a 10-km wide space rock that struck Earth at a speed of 12 miles per second. The impact vaporized the asteroid and gouged out a crater over 100 kilometers wide. The collision released energy equivalent to 100 million nuclear bombs.

The impact sent tsunamis across the planet and the resulting dust cloud blocked out sunlight for months. This caused temperatures to drop worldwide by 6 degrees Celsius (11 degrees Fahrenheit). The asteroid impact is thought to have wiped out about 75 percent of all living species on Earth.

When Did All Dinosaurs Die?

The dinosaurs may have been the largest animals ever to walk the Earth, but they all died at the end of the Mesozoic Era. The reason for their extinction is still a mystery, but we do have some ideas about what could have caused it.

The most popular theory suggests that an asteroid hit Earth at the end of the Cretaceous period and killed off the dinosaurs. There are other theories, such as changes in climate or disease (some scientists think that a virus was responsible).

Whatever happened to them, though, it seems clear that something did happen around 65 million years ago. This caused all dinosaurs to go extinct – along with 75% of all life on Earth! The fossil record shows that many species of dinosaurs existed before this period. After it ended, however, only a few species were left alive. It’s possible that they couldn’t adapt quickly enough when conditions changed. This means they eventually succumbed.

What Caused All Earth’s Animals To Go Extinct Together?

The extinction event occurred around 252 million years ago. It is known as the Permian-Triassic Extinction or P-T Extinction. It remains one of the most severe in Earth’s history. More than 95% of marine species and 75% of land species vanished.

The cause of this mass extinction has been a mystery for scientists. New research suggests that volcanoes may have played a role in the loss of life on Earth. Scientists analyzed rock samples from two volcanic events that took place just before and after the P-T extinction. 

They found evidence that these eruptions released large amounts of carbon dioxide into the atmosphere. This led to changes in sea surface temperatures, ocean acidity levels, and oxygen levels in the oceans. These are factors that could have contributed to extinction during this period. 

Dinosaur Extinction

Food Chain Collapse?

The entire food chain did not collapse when dinosaurs died, but it changed. Many scientists believe that mammals could survive the extinction event. This is because they were small and could eat what other animals left behind. It is also thought that many of the smaller mammals’ predators died out along with the dinosaurs.

Mammals started to grow larger to compete for resources with other animals. Some mammals even developed new characteristics such as warm blood and fur and feathers. The fossil record shows that many birds became larger after the extinction event. They began eating insects instead of plants, which had been their primary diet previously.

Did A Global Climate Change Kill Dinosaurs?

A new Geological study argues that an abrupt global climate change caused by the impact of a large asteroid may have been responsible for the extinction of the dinosaurs, along with many other animals and plants.

The researchers found that there was a rapid cooling event around 66 million years ago. This lasted for about 100 thousand years. They believe that this cooling event was triggered by an asteroid hitting Earth. The researchers also found evidence that this “dinosaur killer” event was followed by a period of rapid warming. This brought about the rise of mammals and led to our evolution.

Dinosaur Extinction

Why Didn’t Plants Die Due To The Asteroid Impact?

The reason plants didn’t die when the asteroid crashed into Earth is that they could absorb CO2 and other gases in the atmosphere. This allowed them to continue growing and thriving while animals struggled to survive.

In fact, scientists believe that plant life actually survived better than animal life during this period. It’s possible that some species of plants were able to survive. This is because they were able to grow underground or in other hidden places where they wouldn’t be exposed to sunlight or other environmental factors.

When Did Non-Bird Dinosaurs Disappear?

Scientists have been unable to pinpoint a precise date for the disappearance of non-bird dinosaurs. However, they have found evidence that suggests the species began to disappear around 15 million years ago.

Evidence from fossils and other sources suggests that the non-bird dinosaurs were already declining in number before their complete disappearance. It is believed that they became extinct due to climate change. The Earth was undergoing rapid warming, which caused ice caps to melt and global sea levels to rise. This changed ecosystems across the globe and affected many species. This includes those that could not adapt or move into new areas where suitable habitats still existed.

Could Dinosaurs Survive The Asteroid Impact?

The asteroid impact that killed the dinosaurs has been a subject of much debate. Many scientists have suggested that no animal could survive such an event. However, there is evidence that some animals did indeed live through this catastrophe.

For example, researchers found a species of dinosaur in India that was alive at the time of the asteroid impact. This discovery challenges long-held beliefs that this event wiped out all dinosaurs. 

It is also possible that some dinosaurs may have survived because they were underground when the asteroid hit. Scientists believe this could explain why so many fossils have been found underground instead of on the surface. They would have been exposed to sunlight and erosion over time (both processes that destroy organic matter.

Another theory suggests that small animals on land may have survived. This is because they lived underwater or in caves (where conditions were more stable). These animals could have then migrated back to land once it cooled down enough to survive there again (as they did after previous mass extinctions). Some scientists also believe that birds evolved from dinosaurs – though no direct evidence exists yet! 

Dinosaur Extinction

Could Dinosaurs Co-Exist With Humans?

It is a commonly held belief that dinosaurs and humans could not have co-existed on Earth. But this is only true if you consider the past 60 million years, during which humans have evolved from apes. If you look at the entire history of life on Earth, however, humans would have had plenty of opportunities to encounter prehistoric creatures like dinosaurs.

The Cretaceous period was just one in a long series of geological eras that have occurred throughout Earth’s history. The Cretaceous period lasted from 145 million years ago to 66 million years ago and was characterized by warm temperatures and high sea levels. During this period, dinosaurs thrived while mammals were still relatively small creatures.


In conclusion, the difference in mineral and element composition between the Earth and the meteorites is one of the greatest pieces of evidence that supports the theory that an asteroid’s impact wiped out the dinosaurs. This distinction indicates that the object was originally separate from our Earth and strongly indicates that it was not just a fragmented piece of rock. So what killed the dinosaurs? Evidence suggests that an asteroid impact caused the extinction of dinosaurs and most living things on Earth at that time. The debate will, however, be ongoing.

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Priyanka Monteiro


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