In Livermore, California, a lightbulb has been burning for 115 years. It’s the longest-burning bulb in the world, and has only been turned off four times since it was put into service.

Our friend Craig Benzine went to visit the “Centennial Bulb” and talk to the folks who are keeping it burning. The resulting video is great fun. Benzine digs into the key question we all have: Why is this particular bulb still burning, when so many others have bitten the dust? Have a look: