The zone of alienation is a place on Earth that is not safe for people to live in or visit. It is located in a country called Ukraine and there used to be a big accident there a long time ago at a place called Chernobyl.
You see, there was a special kind of power plant in Chernobyl that made electricity for people. But one day, something went very wrong and there was a big explosion. This accident caused a lot of bad stuff to come out of the power plant, like really dangerous chemicals and radiation.
Radiation is something that you cannot see or touch, but it can hurt you very badly. It can make you sick or even hurt your body inside. So, when the accident happened, it was not safe anymore for people to stay in Chernobyl and the nearby places. That's why a zone of alienation was made to keep people away and protect them from the dangerous stuff.
The zone of alienation is like a big area around Chernobyl where people are not allowed to go. It is surrounded by a big fence and there are guards to make sure nobody enters the zone. Inside the zone, there are lots of buildings and houses, but they are all empty because it is not safe for people to live there.
The dangerous radiation can stay in the environment for a really long time, even many years, and it can take a lot of time for it to become safe again. That's why scientists say it is still not safe for people to go back to live in the zone of alienation.
But don't worry, scientists and experts are always working to make the zone safer. They use special tools and techniques to clean up the dangerous stuff and keep track of the radiation levels. They also study the animals and plants that live there to see how they are doing and if it is becoming safer for them to live.
So, the zone of alienation is like a special place where people cannot go because it is not safe. But the good news is that people are working to make it better, and hopefully, one day it will become safe for everyone to visit again.