To put Australia's 10 billion rabbits into the Jurassic period, you have to go back to the 1920s first.

Because in this period the number of rabbits in Australia has only ever reached 10 billion, and today there are only about 600 million left.

However, these rabbits have a great ability to reproduce.

Because at first they were only 24, in just a few decades decade, it increased to 10 billion.

So, if the 10 billion rabbits are put into the Jurassic period will not affect the ecological balance at that time?

It is thought that it would not.

Because these rabbits would soon be scattered all over the world, why do you say so?

Let's explore this interesting question.

Australia was a "clean slate" at the time.

As a continent separated from other continents for more than ten million years, Australia had its own biological uniqueness.

That is, the mammals were basically marsupials.

There were no rabbits here.

But then the Europeans arrived and became the owners of the place.

At that time, Europeans loved hunting, especially rabbit hunting.

So in 1859, a British colonist, Thomas Austin, commissioned his friend from far away in England to send over 17 rabbits.

After sending them over Austin first kept them in cages, and soon these rabbits became 24.

After that, he put the rabbits on his farm for hunting.

But what Austin didn't expect was that after just six years, the farm was flooded with rabbits, numbering in the tens of thousands.

Many of which had escaped to the outside of the farm by making holes and gradually going feral.

According to incomplete statistics, by the end of the 19th century there were at least 30 million rabbits in Australia.

After the 1920s, the rabbit population swelled dramatically to 10 billion.

Judging from the reproductive capacity of rabbits, 10 billion of them going into the Jurassic period should quickly become the most numerous animals at that time.

But in fact, they will soon disappear. Why do you say so?

Let's say why from the following three aspects.

1.Oxygen

All extant rabbits belong to the order Haremalia.

But despite this, they are also the ones that did not experience the environment of the dinosaur period.

In the Jurassic period, there was relatively little vegetation due to volcanic eruptions and more geological movements.

So the amount of oxygen in the atmosphere at that time was only 68% of what it is today (about 14% of the atmosphere), which is a low-oxygen environment for animals of the present day.

2.Temperature

The Australian rabbit is a rabbit native to Europe.

And Europe belongs to the northern temperate zone with cold winters, so the fur of the burrowing rabbit is very thick and long.

However, the Jurassic period is different.

Every part of the Jurassic was very warm, even a little hot, and the average temperature throughout the year was about 3°C higher than even today's tropical regions.

This was also fatal for the rabbits, and the excessively high temperatures made it very difficult for this animal with thick and long fur to survive.

3.Survival environment

In the Jurassic period, the vegetation was dominated by large forests.

The burrowing rabbit was a typical grassland animal, and they liked to inhabit the open grassland.

At this time, the Jurassic landscape was not very suitable for rabbits to survive.

So, these rabbits will not cause any ecological disaster when they go to the Jurassic.