A book is a medium for recording information in the form of writing or images, typically composed of many pages bound together and protected by a cover. The technical term for this physical arrangement is codex. In the history of hand-held physical supports for extended written compositions or records, the codex replaces its predecessor, the scroll. A single sheet in a codex is a leaf and each side of a leaf is a page.[1]
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Books were featured in the documentary in 100 years after people as part of the question how long will the records of history and culture will last.
At libraries, the damage comes from microscopic invaders, notably mold spores, already around the surfaces and lying dormant, biding their time for the right conditions to strike, such as high humidity, where Mary Sackett stated that the situation would be increase for the mold. However, some books and documents will avoid the fate, an example of which is the Dead Sea Scrolls, survived 2,000 years in caves in the Judean Desert owing the longevity to the arid climate and damaging sunlight. But the occurrence are rare exception. Mary Sackett stated without people, a book will last for a hundred years, taking one off the shelf. Visually, the book rots on the pages before mold collapses the internal structure. The only trace left of it is a stain on the desk. In other words, 'wood and paper decay'.



