Calvin How Long Was The Calvin And Hobbes Series In The Newspaper Comics?? Is It Still Running?

How long was the Calvin and Hobbes series in the newspaper comics?? Is it still running? - calvin

I recently discovered that there is even a series called Calvin and Hobbes, and searched on Google and found a picture of Calvin as a teenager argument with his mother. It is composed, or is that the true author (Bill Watterson) to keep the series?