How Old Is The World? At What Age Will The World Die?

The question of how old is the world is one of the questions that every person starts to wonder and ask one day. Earth has existed for billions of years and continues to be home to humans for a long time. In addition to being the third closest planet to the Solar System, it is the most habitable planet in the Solar System.

There are countless planets other than Earth to explore. The assumption is that there must be planets in the universe where at least it is possible for humans to live in the current state, and new planets are therefore sought.

The most important reason for the search for a new planet is, of course, that the Earth also has a lifespan. Although it is not quite correct to use the last concept for the universe astonishingly large, it is very valid for planets such as Earth where living things live, and even for planets that are open targets against external threats despite not harboring any living things.

When you take a glance at the short history and life of the Earth, you will realize that the search for a new habitable planet is really important.

How Old Is The World? At What Age Will The World Die?

How Old Is The Earth And How Do We Know It?

Earth is 4.54 billion years old. When you look at a small globe or a map of the World, you are definitely impressed by what you see. These details, which make you realize that the Earth is bigger than you think, have been around for more than 4.5 billion years.

So, what methods did scientists use when calculating the age of the planet? In fact, this process includes almost everything from observation to mathematics.

In the 1800s, scientists tried to determine the age of the planet. Based on the clues, some predictions were made. For example, in 1862, the famous physicist William Thomson shared his work showing that the Earth is between 20 million and 400 million years old.

It is true that this is quite a long time compared to a human lifespan, but the fact that Earth is 400 million years old should ensure that the planet is still as young as it was on the first day. For this to be possible, there must at least be a noticeable difference compared to the rest of the universe.

While there was an incredible difference between Thomson’s estimate and the actual age of the Earth, his observations and calculations were scientifically accurate. It can be said that we owe our increasingly complex dating techniques to the development of radiometric dating.

Radiometric dating determines the age of matter based on the presence of a radioactive isotope. Radioactive isotopes are isotopes that decay over time. Comparing the existence of a radioactive isotope in a substance with its known abundance or the presence of a known decay isotope can be learned how long that substance has existed.

How Old Is The World? At What Age Will The World Die?

In carbon dating, it is only possible to date elements belonging to living things such as an animal or plant that receive carbon as a part of their life cycle. In geology, scientists use radioactive isotopes that have a much longer half-life than carbon.

The oldest rocks on the planet solidified from hot metals. These rocks contain small amounts of Uranium-238. When a rock solidifies, the isotopes in it lock up and begin to rot. Since we know the half-life of uranium-238, we can estimate how much time has passed since that rock was formed.

Scientists have spent several decades finding the oldest rocks on the planet. In Western Australia, there is a zircon crystal, the oldest known fragment of the Earth, which appeared shortly after the formation of the Earth 4.4 billion years ago.

The problem is that rocks are constantly being recycled on the planet. So how can we be sure that our oldest rock is indeed our oldest? To overcome this problem, scientists examined and dated meteor particles and lunar samples. The result obtained here is almost the same as the previous calculation.

Since all calculations give us the same date, the answer to the question of how old is the Earth is thought to be correct. However, it is useful to consider that there is a small margin of error.

How Old Is The World? At What Age Will The World Die?

At What Age Will The World Die?

In almost 1 billion years, evaporation is expected to reach its peak and the carbon cycle will end. In the next few billion years following this event, it is predicted that the magnetosphere will deteriorate and an incredible increase in the Earth’s surface temperature will occur. At the end of all this, life on Earth will come to an end.

With the expansion of Earth’s current orbit, it is also possible that the planet will be destroyed by the Sun a little over 7 billion years later.

Of course, human intervention is among the most important factors that play a role in the destruction of the planet, but this is not the only factor that caused the destruction of the planet.