In this video from Fusion Guy 09, we learn about why people are interested in corks in bottles of wine. There are certain things you should look for when the cork is presented to you. You want to make sure the cork is firm and not cracking. If it is cracked, that means air could have gotten into the wine and stored it. If there is leakage or seepage that is a bad sign too. It might have been stored in a place that was too warm. You can also smell the cork for cork root. He said if you can smell pet dog or wet newspaper in your cork, that's a bad sign.