Dinosaurs flourished during the Cretaceous period：

During the late Cretaceous period, the old Earth continents changed due to the movement of tectonic plates.

The continents began to separate and move, forming different geographical configurations.

This led to changes in the distribution of dinosaurs around the world and the emergence of a variety of different ecosystems and species combinations.

So, in addition to appearing primarily in specific regions, their relative reptile species or related dinosaur fossils may also be found elsewhere.

The specific distribution and migration patterns of dinosaurs are being studied and inferred by scientists from the fossil record and geological evidence.

In summary, the Cretaceous period was a time of great diversity in dinosaur evolution.

From giant Argentinosaurus to agile Velociraptors, a variety of species thrived during this time.

At the same time, the Cretaceous period also marked the end of the reign of dinosaurs on Earth.

Source from – https://www.livescience.com/3945-history-dinosaurs.html

The old Earth’s diversity can be seen from the extinction of dinosaurs:

According to one theory, a global dinosaur extinction event, possibly triggered by a meteorite impact. It led to the demise of the dinosaurs, as well as many other species that existed at the time.

This catastrophic event ended the Mesozoic era and paved the way for the rise of new life forms in the Cenozoic era that followed.

The extinction of the dinosaurs remains a fascinating subject of scientific study. And ongoing research continues to shed light on the various events that shaped Earth’s history.

The Cretaceous – Tertiary extinction event altered the trajectory of life on Earth. Creating opportunities for the rise of new groups of organisms.

In any case, this historical event reminds us to cherish the diversity of life now. And reminds us again and again that the only constant is the extraordinary fragility of life.

We try to guess what would have happened if the tertiary extinction event had not happened and the dinosaurs had not been wiped out.

Source from – https://www.livescience.com/3945-history-dinosaurs.html

If dinosaurs had not gone extinct, they would have continued to populate the Earth, evolving and diverging further into more species.

They may occupy different locations in different environments, forming more complex ecosystems.

Other animal groups that competed with dinosaurs would have faced even greater challenges. That leading to dramatic changes in their evolutionary paths.

In this case, the animal world we see today would be bizarre, with creatures with all kinds of strange and powerful abilities.

On the other hand, the existence of dinosaurs would have had a different impact on the evolution of mammals.

Mammals may have evolved under pressure from dinosaurs to develop more efficient survival strategies.

They would have developed and diversified more quickly, possibly occupying different ecological niches and forming different species.

However, these are just speculations, and we cannot predict exactly what would have happened if the dinosaurs had not gone extinct!

What would the world be like today if human evolution had taken a different path, or if humans had not become the top predators on Earth?

What if dinosaurs suddenly appeared in the human world:

1 Second
While dinosaurs show, people could feel confused and scared.

5 Seconds Later
People are rushing to get on public transport and get home.

10 Seconds Later
Accidents happen everywhere because of people running around and traffic chaos.

11 Seconds Later
People are going back to supermarkets to buy supplies for days at a time.

15 Seconds Later
It would be safer to stay at home.

30 Seconds Later
People will go crazy on the Internet. Dinosaurs are back.

40 Seconds Later
Even relatively solid houses can be destroyed by dinosaurs.

1 Minute Later
News organizations and governments issue warnings to remind people to be safe.

3 Minutes Later
Some places won’t be able to communicate after a dinosaur attack. Communication equipment is interrupted.

6 Minutes Later
Schools are closed, 90% of work stops.

10 Minutes Later
The nights will be even darker because of power out of work in some places.

11 Minutes Later
The roar of a dinosaur can cause a fear of death.

13 Minutes Later
Scientists will get together and brainstorm ways to deal with it.

20 Minutes Later
The army will be sent out to hunt dinosaurs.

45 Minutes Later
When dinosaurs are attacked by armies and get scared, they move away from human civilization.

55 Minutes Later
Humans stand in the way of the dinosaurs’ escape, many will be trampled to death, and the death toll will skyrocket.

3 Days Later
Wild animals and rural livestock would have been targets for carnivorous dinosaurs.

10 Days Later
Animal experts will be called in to find ways to deal with the situation and prevent the killing of the dinosaurs and the destruction of the animals.

30 Days Later
Baby dinosaurs can be domesticated as livestock or pets.

40 Days Later
Herbivorous dinosaurs may not have adapted to modern plants and could have been poisoned to death.

50 Days Later
Illegal hunters began poaching dinosaurs.

2 Years Later
Targeted by poachers, dinosaurs will once again become an endangered species.

5 Years Later
Tyrant like T-Rex will still rule the animal world.

10 Years Later
The dinosaurs would be kept in zoos or protection zone.

In the modern world, the resurrection of dinosaurs is up to model makers:

Finished customized animatronic Spinosaurus:

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