Explaination: UFO cases that generate buzz

UFO investigators see references to rocket ships, aliens & astronauts that go back to the days when humans first put chisel & paintbrush to rock. More than 6,000 years later, objects that are unidentified — at least at first — continue to appear in the skies & generate buzz.

Take, for example, the blazing pinwheel that appeared in Norwegian skies in December 2009, shown here. The sight sparked speculation that aliens were sending earthlings a signal. Other researchers speculated — & the Russian military later confirmed — that a missile failed.

NBC space analyst James Oberg says the incident fits into a long tradition of UFO sightings over Russia that are caused by secret military & space activities. Even when there's a prosaic explanation for the sightings, they can provide useful information about covert activities.

According to an organization that tracks UFO reports, this summer has been an especially busy period for UFO sightings. The Mutual UFO Network (MUFON) noted that sightings increased over the past six weeks, with some states more than doubling their normal numbers.

Posted in: Latest Technolgoy,Mysterious World,Unsolved