<h2 class=" eplus-wrapper">What's happening? </h2>

The librarian could not believe it. On the doorstep was a package. It was a plastic bag. Inside were two old books. There was a note that said: "Happy Easter".

But the books were not just any books. They were diaries kept by Charles DarwinHis book, On the Origin of Species by Means of Natural Selection, is the founding work of evolutionary biology.. 

The notebooks have been missing since 2001. They were stolen. Now, somebody has given them back.

Charles Darwin was a scientist. He made the Theory of Evolution popular. The theory says that living things change over time to survive.

<h2 class=" eplus-wrapper">Find out more </h2>

For a long time, scientists thought evolution was a bit like a family tree. But this might be wrong. Instead, species might all be merged - a bit like a giant spider's web. 

Yes! Experts today can study many more species than Darwin. They see that evolution is not as simple as we thought. We are all interconnected in different ways. 

Not really. We might have come from some other living species. But Darwin's basic idea is still true. A tree is a better way to imagine it. The whole world cannot be connected through a web. 

Charles Darwin - His book, On the Origin of Species by Means of Natural Selection, is the founding work of evolutionary biology.