But for more than a decade he has also courted a more contentious subject—namely, space aliens, including how to find them. Scientific American spoke with Loeb about the book, his controversial hypothesis and why he believes science is in crisis. And most importantly, I don’t need to think about what’s wrong with all the things that other people say! Speaking of important things, here is one I think we both agree on: in science, we must keep each other honest. I don’t see the search for technological signatures any differently from the search for the nature of dark matter.