aliens

A new series that will no doubt spark your curiosity is coming to the Discovery Channel and it has some big names on board. The show very aptly titled 'Curious' will explore such things as how the world will end, how drugs work on the body, what lies under Egyptian's ground, could we survive an alien invasion and why is sex so fun.

Conspiracy theorists would suggest these cloud phenomena are caused by UFO's or Secret Government projects. But what are they really. Or at least what do scientists theorize causes them.