Strange holes in clouds: It's not UFOs, folks
A new study in the journal Science suggests that airplanes can induce small amounts of rain and snowfall by punching "holes" in cloud cover. So what exactly do these holes look like, and how are UFOs involved?
A hole-punch cloud chills over Antarctica
A 2009 aircraft-induced hole at the West Antarctic Ice Sheet Divide Camp is seen in this media image from the journal Science. In its recent report on hole-punch clouds, Science did not use the words "intergalactic," "probe" or "Alpha Centauri" even once.