As science reveals, planet Earth it exists for about 4,5 billion years, and people call it a "home" for only 200 years. Thus, it is logical to confirm that our planet existed and developed before us, and will continue to do so if humanity eventually disappears, writes Croatian Express.

What would happen if the man disappeared, experts predict:

After a few hours

A few hours after humanity disappears, it will not be long before the radical change in the world is felt, and the planet as we know it, begins to change forever. Given that all power plants in the world run on fossil fuels, which by the way are produced by human power in power plants, electricity will soon run out around the world. This means that all lights and machines operating through the power plants will stop working. Darkness is likely to prevail around the world, but not completely because there will still be electricity from solar panel tanks and windmills.

After a few days

Although solar panels and windmills still generate electricity, after 48 hours without proper maintenance, they will stop working and then the planet will definitely be without power. Meanwhile, pets are already starving and dehydrated because they have not received proper care. Most pets start to die because they lack the care they are used to, which has already made it impossible for them to survive on their own. Underground subway stations will start to flood because there will be no one to operate the pumps that keep them dry.

In a few weeks, crossbred dogs, especially terriers and bulldogs, will begin to die. Larger dogs will start grouping and hunting smaller animals for survival. Pets will become prey and food source for wildlife. Soon zoo animals will begin to leave their cages and return to their natural animal instincts.

After a month

Water that maintains the temperature of nuclear power plants will evaporate, causing devastating nuclear explosions. Millions of wildlife will start to get cancer due to radiation from the blasts.

Sewerage based on power plants will stop working and rivers and lakes will be filled with sewage waste. That waste will be deadly to most wildlife whose ecosystem livelihoods depend on rivers and lakes. Chemical and natural industry plants will begin to have an impact on the environment. As chemicals penetrate the air and so do natural gases, the world will become a land of fires that last for days.

After a year

If humanity disappears, in a year the Earth will begin to rebuild itself due to the reduced threat from man. Without ѝ "Bored" man, it will take less time to regenerate from all the damage caused by fires from damage to nuclear, natural and chemical plants. All the products that were supposed to be recycled will probably be in the water, and large structures, such as bridges, buildings or the Eiffel Tower, will probably "crack", ie the phase of decay will begin.

After 25 years

Without humanity mutating their genes to grow faster and easier, plants on Earth would begin to change. It will take two decades to complete, but the vegetation will begin to return to its "original form". Also, in the meantime, the plants have probably already entered the cities, so they have outgrown the streets and buildings that are now covered with grass and other greenery. Then the cities will be ruled by wild animals, and the buildings will begin to collapse to complete destruction. Cities like Las Vegas and Dubai will return to their natural state, that is, they will be covered in desert sand. Pollution will be a thing of the past, so visibility in all cities will be the same.

After 300 years

Animals now rule the world, and once-endangered animals, especially elephants, are now returning to the planet without the threat of extinction like those of ivory traders. The fact that the animals escaped from the zoos contributed to the diverse distribution of various wildlife around the world.

The lions and elephants that Africa was once home to are now wandering in what is left of Manhattan. Large structures such as bridges, buildings, and the Eiffel Tower collapse to the point of complete collapse. And the marine world will suffer the consequences of the extinction of mankind, because the waters will be full of wildlife.

After 10 years

All cities and indications that humanity once existed will disappear, except for some stone buildings. 10 years after the extinction of humanity, only the Pyramids, the Great Wall of China and Mount Rushmore will remain. It is assumed that only these structures have the capacity to last so many years and they will be the only witness to the existence of man on planet Earth.

After 50 million years

The only thing that will survive 50 million years on planet Earth will be plastic, because it does not biodegrade - plastic breaks down into smaller and smaller pieces, but they never disappear, and it takes too long for that process to take place.

If there are aliens visiting our planet, they will probably be amazed at the plasticity of the plastic. Planet Earth will probably need another 50 million years to cleanse itself of all plastic as the only proof that humanity has ever occupied the planet.