Texans still wonder what the causes the "Marfa lights" - a starry show of dancing colors against the background of the Chinati Mountains.
For more than 130 years now, believers will tell you ghost stories and urban legends about the illuminated west-Texas sky. Skeptics will point to science-based reasoning behind the strange phenomena. Some studies say they're caused by headlights along the highway. However, this phenomenon has been around since before cars were invented.
Whatever it is you believe: you'll want to learn about the theories that surround the mysterious light event.
From phosphorescent gas to jackrabbits, these are the possible explanations behind the Marfa Lights: