Google has changed a lot in the past 17 years but there have been very few changes in the Google logo. The word ‘Google’ has evolved from being a noun to a verb in the dictionary.
Here is the new logo:
The new design shall roll out across all Google Products Soon.
Google mentioned on their blog that:
This isn’t the first time we’ve changed our look and it probably won’t be the last, but we think today’s update is a great reflection of all the ways Google works for you across Search, Maps, Gmail, Chrome and many others. We think we’ve taken the best of Google (simple, uncluttered, colorful, friendly), and recast it not just for the Google of today, but for the Google of the future.