'They are the digital-age equivalent of crop circles - mysterious patterns appearing on the Bureau of Meteorology's national radar system without any explanation. And the random images described as red stars, rings of fire and white doughnuts are sending online conspiracy websites into meltdown.The anomalies first began on January 15 when an "iced doughnut" appeared over Kalgoorlie in WA. Satellite imagery showed there was no cloud over the area at the time to explain the unusual phenomenon but farmers' online comments claimed it was "unusually hot" all day. It was followed by a bizarre red star over Broome on January 22 and a sinister spiral burst over Melbourne described by amateur radar buffs as the Ring Of Fire Fault.' ...Read more:...