FOSTER: It could be the most Earth-like planet ever discovered. Time now for our Parting Shots images that make you think and keep you talking. A US astronomer says this planet, seen here in an artist's rendition, just might be able to support life, would you believe? That's because it has surface gravity and appears capable of sustaining water in liquid form. We Earthlings aren't exactly neighbors. The planet is 20 light-years away. Sounds far, but consider the Antennae galaxies captured by the Hubble Telescope. They're 62 million years -- light-years away. And this huge cluster of galaxies also snapped by the Hubble is 2.2 billion light-years from Earth. Do we have to go far, though, to find a habitable planet? We have Mars, virtually on our own backyard. Experts believe much of it was once covered in waters. Here, you see gullies and a crater. But all we really know for sure right now is that Mars has a lot of ice. Maybe we are alone in the universe. Then again, maybe we don't have to go looking for life in outer space after all. Consider this statement from a US researcher at a news conference with former Air Force personnel.</s>ROBERT HASTINGS, UFO RESEARCHER: I believe, these gentlemen believe, that this planet is being visited by beings from another world who, for whatever reason, have taken an interest in the nuclear arms race, which began at the end of World War II.</s>FOSTER: Food for thought for you. We'd love to hear your thoughts on any of our stories. As always, just head to our Web site, cnn.com/connect. You'll find everything you need there to get involved in the program. I'm Max Foster. "BACKSTORY" is next, but we're going to check the headlines before we go to that. Ecuador's government has declared a state of emergency and put the military in charge of security. END
The Possibility of Life on Other Planets and UFOs Visiting Earth in Parting Shots