In my egg crate, I dound a bit bigger egg, which has lines which look like nurves. I don't know what is that exactly. Also, I am not willing to boil/crack it or throw it either. Tell me what can I do with it? If I can submit it to any science center and get an idea what it was like that, that will be best.
Please help me out...

The lines are probably caused by calcium build up. I doubt a science center would be interested.

What are nurves?

Whatever it is, its dead. Baby anything that comes from an egg cannot survive the cold. I'd throw it if I were you before it rots and spoils everything else.