The Cambridge University Library in England has introduced that  tens of thousands and thousands of kilos really well worth of notebooks via way of means of British naturalist Charles Darwin were lacking for 20 years. 

One of the notebooks incorporates the well-known Tree of Life diagram, wherein the nineteenth century scientist, who's visible because the founding father of the principle of evolution via way of means of herbal selection, examines the evolutionary relationships among species. 

The library curators 'extensive research' concluded that the notebooks have been stolen and sought public help to locate them. The head of the college library, Dr. Jessica Gardner stated the disappearance of the notebooks was "very painful" and they might do something to locate it. 

Darwin's notebooks had been closing visible in November 2000, once they had been eliminated from the library's unique manuscripts phase for photographs.