Since the launch of the manned space program more than 50 years ago, cameras aboard NASA spacecraft have captured thousands of images that have been shared publicly to the delight of millions. Many show stars, views of Earth and other expected sights. However, hundreds of these pictures reveal imagery that leave scientists scratching their heads. NASA’S UNEXPLAINED FILES explores these mysteries and the latest evidence for life beyond Earth. Science Channel viewers will get a rare sneak peek at the all-new season of NASA’S UNEXPLAINED FILES on Sunday, Feb. 21 at 10PM while the series returns for season three on Tuesday, Feb. 23 at 10PM.