Life beyond Earth and UFOs: What does the ‘evidence’ tell us?

The question of whether humanity stands alone in the universe is one of the biggest questions there is. Is there life beyond earth, and if there is, is it intelligent life? Can the evidence of UFOs and alien contact be trusted? Ciarán Dunbar is joined by Astrobiology Professor David C. Catling, and Sunday World reporter Níall Feiritear, who has had an experience that has convinced him.

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