This is a type of code where: The Rotated Alphabet encoding, all of the letters are rotated a certain amount. For example, if "A" corresponds to "J", then "B" corresponds to "K", "C" to "L", "D" to "M", and so on.
Click start. You will see a 'quote' but it is all jumbled up. There are a number of strategies you could use to solve this, the most basic being just clicking through each possibility, one-at-a-time. I strongly encourage you to think of something better!
A few suggestions would be to look for the smallest words. Two and three letter words are most likely one of a few possibilities, like the, and, it, an, or, so if you can figure those out, the rest is easy!
Look at the end of the quote, the name is given. Maybe Google a list of scientist names and see if the number of letters in the first/last name match up, narrowing down your options.
Use your brain and come up with your own, depending on the given quote!