Last time Google updated their Google Image Service approximately 2 years ago but it was an official update and the updates were of major kind.

Today it is seen that Google updated their Google Image Service by adding a cool Thumbnail Hover effect to the Image search results.'

Previously, each Image search result had the source name and the url just below the image thumbnail. But with this minor update it is seen that the source and url are only shown when the cursor is hovered above the specific image thumbnail.

Here is a peek:

Google just keeps getting better doesnt it?