There’s no denying the allure of alien artifacts. That said, scientists have been anticipating the possibility of encountering alien artifacts since the dawn of the space age. “But being responsible scientists means holding to the highest standards of evidence and also not crying wolf.”That raises some tantalizing questions: What is the best way to search for alien artifacts? Frank says he agrees that the stigmatization of the search for otherworldly artifacts—and the search for alien life, more broadly—is counterproductive. But he sees the pushback over research into alien artifacts as a healthy and natural part of scientific inquiry.