Mysterious Radar Cloud Over the Midwest Was Actually... Butterflies

Was it a bird? A plane? A tornado cell? Nope. The huge, slow-moving cloud picked up on radar in Illinois and Missouri last week was nothing anyone expected. The US National Weather Service reports it was actually a swarm of millions of monarch butterflies—which have been disappearing at alarming speeds over the past… » 9/23/14 9:56am 9/23/14 9:56am