Aliens and science don’t usually go together. Maybe it’s the, let’s say, “disheveled” look of the overly eager UFO enthusiasts and abductees. Both professional and amateur astronomers alike are quick to distance themselves from talk of UFOs. But that is a far cry from saying there is no alien life. While there remains no solid proof of extraterrestrial life, more and more discoveries do seem to hint that it exists. A July paper in the International...