'What is the biggest wonder it this world?' was the question posed to Yudhishtir.

The story is when five brothers (Pandav) were exiled to forest, once the eldest brother, Yudhishtir asked his younger brother Bhimsen to fetch some water from a near by lake. Bhimsen went and ust as he bent to put pot in the water, a voice of fallen angel (Yaksh) was heard, 'This is my lake. You will have to answer my 60 questions before taking the water,' Bhimsen had power of 10000 elephants in him. He rubbished the warning and went ahead to collect water from the lake. Yaksh pulled Bhimsen into the water and detained him.

After waiting for a long time, Yudhishtir sent other brother Arjun. Same story repeated and Arjun was detained. Similarly two more brothers Nakul and Sahadev too were detained by Yaksh. In the end, Yudhishtir went himself.

Yaksh again said, 'This is my lake. You will have to answer my 60 questions before taking the water. Otherwise your four brothers are in my custody and you too would end up with them.'
Yudhishtir said, 'Fine. What are your questions?'
The first question was -'What is the biggest wonder it this world?'
Yudhishtir replied,'Everyday people see others are dying without any notice, but those who are alive think they are not going to die.' The one who dies is never aware of the exact moment of death.

That is death can approach any time and therefore one should expect it any moment because people of all ages die. Death does make any distinction. People of all types whether young or old, whether rich or poor, whether ruler or beggar, whether ailing or in good health - all suffer death without notice and hence it is surprising that living person thinks that he will not die the next moment.