Mysterious Lights Could Be Explained by Microlightning

For centuries, cultures around the globe have reported strange lights flickering in swamps, forests, and even graveyards. A recent study suggests that there might be a logical explanation for these ghostly phenomena: a peculiar type of ‘microlightning’.

Often referred to as will-o’-the-wisps, jack-o’-lanterns, or ignis fatuus, these floating flames have sparked a variety of colorful legends. Many stories depict them as spirits of the deceased or as lanterns carried by lost souls forever wandering the earth after having, perhaps, outsmarted the Devil.

So, what’s the science behind this intriguing folklore? Traditionally, explanations have pointed to pockets of swamp gas that ignite spontaneously, but it’s puzzling how they would catch fire without a definitive trigger.

New research led by Stanford University chemists indicates that microlightning may be responsible. This small-scale electrical discharge can occur in electric fields where gases and liquids interact, potentially igniting methane gas present in bubbles with differing charges.

In their experiments, the researchers introduced air and methane into water to create tiny bubbles, capturing the results with a high-speed camera. They observed microlightning flashes lasting only a fraction of a millisecond appearing consistently throughout the experiments.

Interestingly, even when only air bubbles were used, flashes were still evident, but the presence of methane seemed to increase their frequency.

“Microlightning between methane microbubbles offers a natural ignition mechanism for methane oxidation under ambient conditions,” the researchers noted in their findings.

They also mentioned that this discovery strengthens the previously suspected connection between electrified surfaces and spontaneous cool flames, providing a scientific basis for the phenomenon of ignis fatuus.

This intriguing phenomenon might not only clarify the mystery of will-o’-the-wisps, but it could also have had significant implications for the emergence of life. Some researchers previously proposed that microlightning might have been the initial spark that triggered the chemical reactions necessary for life to emerge from non-living materials.

The study appeared in the journal PNAS.