Contrary to popular belief, Google engineers are not all that serious or never-smiling guys. Google's occasional Easter eggs which are puns that Google adds to their search engine is ample proof. And the latest is on Chuck Norris.
Google had released the knowlledge graph feature which shows a small section on the right of the search page with an image and details on the best match of what you are searching for. And it is in the knowledge graph that Google confirms these Chuck Norris "FACTS".
Just search for "Chuck Norris" in google.com and you can find that in addition to his small personal biography, Google also shows one of the million Chuck Norris jokes as a fact about him.
The facts change to a new one every time you refresh the page. So if you want to make a collection of the famous Chuck Norris facts, just start refreshing and copying :)
If you are interested, here's some Chuck Norris facts you might not have heard of -
A Handicap parking sign does not signify that this spot is for handicapped people. It is actually in fact a warning, that the spot belongs to Chuck Norris and that you will be handicapped if you park there.
When Alexander Bell invented the telephone he had 3 missed calls from Chuck Norris
Chuck Norris does not use spell check. If he happens to misspell a word, Oxford will simply change the actual spelling of it.
After much debate, President Truman decided to drop the atomic bomb on Hiroshima rather than the alternative of sending Chuck Norris. It was more "humane".
There is no "CTRL" button on Chuck Norris' computer. Chuck Norris is always in control.
Note: The knowledge graph is not rolled out everywhere. So if you are not able to see it, just change the Google URL to .com instead of a country specific one like .in or .fr.