I have kind of a stupid question, but I believe it's valid.
What exactly happens when a Yuga changes from Satya Yuga -> Treta Yuga -> Dwapar Yuga -> Kali Yuga?
I don't have any reference to cite, but it says that in Kali Yuga, the average age of a person is 100 years whereas in Dwapara Yuga it's 1000 years and Treta Yuga 10000 years (I guess).
Then what will happen during transition of one Yuga to another; let's take the case of Parikshit and Yudhisthir. I believe that Kali Yuga had started at the time of Parikshit. So, how exactly does the age difference happen? Behavioral changes can be applied directly but structural changes to human body is hard to go unnoticed.
Is it immediate or slow? How do people react to the change?
I know it might sound crazy, do we have any reference to that in Hindu scriptures or the history books?