The Reason Why Ancient Giant Animals Are Extinct Fast

The Reason Why Ancient Giant Animals Are Extinct Fast
The Reason Why Ancient Giant Animals Are Extinct Fast

Why did the ancient giants go extinct so quickly? There are at least five scientific reasons to answer this question. As is known, dinosaurs which are one of the ancient giant animals ever existed and lived on planet Earth which was estimated to be 230 million years ago. According to research, dinosaurs became extinct about 65 million years ago.

Interestingly, the ancient giant animal became extinct in a fairly short time. How could that be? Now curious about the reason, here's science will answer the reason behind the extinction of this giant animal.

Drastic Declining Food Supply

As is known, every living thing needs a supply of food to survive. As for giant animals, the food supply needed is very large.

According to research, ancient giant animals quickly became extinct because food supplies suddenly decreased drastically. This is due to changes in climate and temperature (too) drastic. For giant carnivores, they are very difficult to become smaller animals than them as soft food.

Because, some of these small animals will migrate to safer places. Others died from climate change. As for herbivorous giant animals, they are also very difficult to find food because plants no longer produce leaves.

The body of a large animal is very detrimental

As mentioned above, these ancient giants became extinct rapidly due to drastic changes in climate and temperature. This is a disaster for an animal that has such a large body.

Yes, they must have had a hard time migrating quickly to a safer place. There are only two choices, die or adapt to changing circumstances. If not able to adapt, the giant animal will certainly die.

Please note, ancient giant animals are not like large animals that exist in modern times. Maybe we call elephants, giraffes and hippos as very large animals compared to other animals in modern times. In fact, the average elephant 'only' weighs 5 tons.

This is different from the giant animals of ancient times. Call it Argentinosaurus which weighed up to 100 tons and was 37-40 meters high. Its super large body is what makes it difficult to move quickly.

Meteor Hits Earth

Some scientists conclude that the extinction of the ancient mercury animals was caused by a large meteorite that hit Earth. This event occurred about 65 million years ago.

This tremendous impact resulted in the death of most living things on Earth. More than that, the Earth also became dark, the temperature dropped drastically to the point of lack of oxygen.

Again, this is a theory that some scientists believe in. In other words, there were other factors that caused the giant beasts to quickly become extinct besides the impact of a large meteorite.

Drastically Reduced Oxygen

Scientists say the drastic amount of oxygen was a major factor in the rapid extinction of the ancient giants. Not only land animals, animals that live in water also die at the same time.

Interestingly, according to research, small animals such as insects, mammals, and small reptiles actually survived these deadly conditions.

One example of an ancient animal that still survives and we can still find today is the crocodile. This shows that crocodiles can adapt well in the midst of lack of oxygen.

The amount of oxygen that is drastically and massively reduced has an impact on mass deaths. You can imagine this earth, which was originally rich in oxygen, suddenly became oxygen-poor. Scientists predict the event as the most torturous event in history.

Natural selection

As is known, natural selection also contributed greatly to the extinction of animals, including ancient giants. Natural selection is the ability of nature to 'choose' living things that are not well adapted. Living things will also experience death.

Natural selection can take the form of disease outbreaks, climate change, temperature changes to natural disasters. This natural selection 'generates' new species that are well adapted to Earth's current conditions. This new species has also evolved and regenerated to this day.


There are at least five scientific reasons why ancient giant animals quickly became extinct. Starting from the drastically reduced food supply to natural selection.

The essence of the five reasons I wrote above is the inability of ancient giant animals to adapt to the drastically changing conditions of the Earth. This causes the death of living things, including ancient giant animals en masse and at almost the same time.
Next Post Previous Post