This is done with synthetic biology where the words are translated into the DNA code (using letters a, t, c, g) and then construct them into DNA strands. These strands are then inserted into the organism, in this case an apple.
It won't be easy, though. The hard part comes with the sheer amount of information on Wikipedia. The English version of the website contains two and a half billion words, and only a few thousand words at best can be held in an apple at a time.
Davis explained that because all of Wikipedia will not fit into a single apple, bits and pieces of it will instead be spread across many apples and many trees. "I can fit the whole Wikipedia in a small forest, in—let's call it a very large grove."
This idea comes from a man who is known for trying crazy things. Davis was the first person to insert art into the genome of a living organism in 1986, and has tried to reengineer silkworms to spin gold. Half of his leg was lost when he "kissed an alligator," and after Hurricane Katrina, he built a 106-foot tall steel tower that captured lightning strikes and hurled them back at the sky in protest.
