UFO

Many listeners wrote in about Wade Goodwyn's story on UFO sightings in Texas, and one pointed out that we missed a teaching opportunity about superior mirage phenomenon. Robert Siegel talks with Christine Pulliam, a spokeswoman for the Harvard-Smithsonian Center for Astrophysics, to find out more.

Stephenville, Texas, is abuzz with talk of UFOs. Several residents — including a pilot — have reported seeing a large silent object with bright lights flying low and fast, describing it as "nothing from these parts." Federal officials say there's a logical explanation, but locals insist the object was larger, quieter and faster than an aircraft.