Billions of years ago, another planet smashed into Earth. An event of this epicness could have created our Moon. It also could have brought alien life to our planet. What evidence of this planet still exists on Earth today?

While Steven Spielberg has created some of the best aliens in cinema, the 79-year-old director now claims he also knows a thing or two about real-life extraterrestrials.

To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.

American Religious Belief in Extraterrestrial Life (Princeton Univ., Sept.) argues that several American religious traditions have long believed in that aliens exist—and want to help us.

EVE HEWSON: (As Jane Blankenship) What are you going to do? O'CONNOR: (As Dr. Daniel Kellner) Full disclosure to the whole world. FLORIDO: It is the latest film that Spielberg has directed about aliens visiting Earth. Of course, there are many other films ...

Steven Spielberg's new film “Disclosure Day” explores extraterrestrial life and its impact on religion. UFOs, now also called UAPs, are gaining mainstream attention.