Great Space Balls of Fire! How to Explain Weird Sightings Over Australia?

Those "green UFOs" that caused a stir in Australia four years ago? Researchers say they definitely weren't alien spaceships (not like they were going to say anything different), but they still aren't sure what they actually were. The three green fireballs were spotted by more than 100 people in the sky over Queensland, Australia on May 16th, 2006. The potential abductees said the lights were brighter than the moon, but not as bright as the sun. A single farmer claims to have seen one of the green balls bouncing down the side of a mountain after hitting the earth. Stephen Hughes, a researcher at Queensland University of Technology in Brisbane, has just published a paper on the phenomenon in the Proceedings of the Royal Society A. He explained to LiveScience that the main fireballs were most likely caused by a meteor breaking up and burning in earth's atmosphere: