"There are many in the science field that think we're just one small piece in a larger puzzle. The signs are not just here on Earth but flying above us all the time. Believers say the well-known "Phoenix lights" phenomenon from 1997 is just one example of extra-terrestrial life.
Dr. Paul Davies, an Arizona State University physicist known for his popular science writing, says, "We know Earth and Mars have exchanged material over the years and it's easy to imagine a microbe hitching a ride in a rock through space and going from one planet to the other. I think it's inevitable that if there was life on Mars in the past it would have come to Earth and vice versa." (For more of Rich Dahlquist article click here. )
