Over the next few days Google is rolling out an update to Google Images. Google built Google Images in 2001 and today the it has an index of over 10 billion images.

Here?s what?s new in this refreshed design of Google Images:

- Dense tiled layout designed to make it easy to look at lots of images at once.

- Instant scrolling between pages, without letting you get lost in the images. You can now get up to 1,000 images, all in one scrolling page. Google will show small, unobtrusive page numbers so you don?t lose track of where you are.

- Larger thumbnail previews on the results page, designed for modern browsers and high-res screens.

- A hover pane that appears when you mouse over a given thumbnail image, giving you a larger preview, more info about the image and other image-specific features such as "Similar images."

- Once you click on an image, you?re taken to a new landing page that displays a large image in context, with the website it?s hosted on visible right behind it. Click anywhere outside the image, and you?re right in the original page where you can learn more about the source and context.

- Optimized keyboard navigation for faster scrolling through many pages, taking advantage of standard web keyboard shortcuts such as Page Up / Page Down.

Google is also launching a new ad format called Image Search Ads. These ads appear only on Google Images, and they let advertisiers include a thumbnail image alongside their lines of text.