Haha: Must be from translation error.  The title of the book is "Journey to the Center of the Earth" the most popular translation from French (Voyage au centre de la Terre).  It is also known as "Journey to the interior of the Earth" but never the "world".

A few words about the famous Jules Verne's novel - "A Journey to the Interior of the World

I just wanted to say some a few words about the Jules Verne's novel - "A Journey to the Interiorof the Earth World".

Has anyone of Did you read it?

I have did, about a month ago.  , and The author's ability to narrate about something that he had never seen or heard about, has astonished me. And Although Jules Verne hasn't got did not have a particular scientific education on science, he was deeply aware with the major and not so major knowledges about the things he wrote on about. Perharps this statement is truthful true for about all Jules Verne's his novels.
But However, for this particularly in this novel, I recognised some hypothetical obstacle that may interpose all author's questionable scenarios in the story. As You may have noticed if you have read in the novel, beneath the surfice of the globe the main personages in the novel find an entire biological world. But the rays of the Sun couldn't penetrate to this microbiological system. sunlight cannot reach the interior of the earth.  And and here is my question asking: "Is it possible that a bioilogical microsystem to can exist without the crutual crucial influence of the sun's energy?" Isn't  this energy not neccesary for plant life? the reproducing of flora's speicies, and If the answer is "yes", what about the all circulation of this biological system that is untouched from the Sun? Don't understand your sentence.  The answer is yes.  All fungi does not need the sun to survive.  They sprout out of the surface of the soil in order to spread their spores.  Also deep in the ocean where volcanic activity causes the water around to be boiling, there are giant worms and plant life teeming in such toxic waters.  The world is indeed a strange and wonderful place.  We haven't discovered everything yet.

Of course, this novel is a science fiction work and my reasoning should not be taken for extremely serious scientific inquiring inquiry,

 
What do you thinkg about the of my question?
:)

If you read the book carefully, there is an artificial light enamating from the rocks that give this place a "natural" light; otherwise how would our heroes navigate around easily.