“Ancient Aliens: Season 13” goes on to interview a host of authors and experts who provide tidbits of their research about UFOs across a wide spectrum. Although first identified as a flying saucer, the military quickly walked back those early claims and said the object was merely a downed weather balloon. The story begins in July 1947, when a purported alien crash just outside Roswell initiated what are still unanswered questions about extraterrestrial visitations to earth. Both items were obtained from White Sands, New Mexico, near Roswell. The second object is a small tab of aluminum, 99.5 percent pure. A small layered piece of metal, pure bismuth on one side, magnesium-zinc alloy on the surface of the other – each layer only microns thick. Tsoukalos, publisher of Legendary Times Magazine, regards two artifacts presumably of alien origin in wonderment. She pulls out a silver attaché case, sets it gently on a table, opens it, and reveals the contents of a cloth bag. Season 13 of “Ancient Aliens” opens with investigative journalist Linda Moulton Howe accessing a safety deposit box inside a bank vault. Join Giorgio Tsoukalos and other ancient astronaut theorists as they continue their search for evidence of extraterrestrial contact in the distant past as well as the present.