What are some answers to the Fermi paradox?
If we do nd life on Mars, what might be some ways to check whether it formed separately from Earth life, or whether exchanges of material between the two planets means that the two forms of life have a common origin?
If there is no evidence that UFOs are extraterrestrial visitors, why do you think that television shows, newspapers, and movies spend so much time and effort publicizing the point of view that UFOs are craft from other worlds? Who stands to gain by exaggerating stories of unknown lights in the sky or simply fabricating stories that alien visitors are already here?
Think of examples of contact with aliens you have seen in movies and on TV. Discuss how realistic these have been, given what science tell us. Was the contact in person (through traveling) or using messages? Why do you think Hollywood does so many shows and lms that are not based on our scientic understanding of the universe?