We've looked other places, maybe not as hard as we should or we could, but we've looked and haven't found any; Earth is the only place we know of with life. Is Earth special? This is a question I've wanted to know the answer to since I was a small child, and I suspect 80 percent of this auditorium has thought the same thing and also wanted to know the answer.
Hemos visto otros lugares, quizá no tanto como deberíamos o podríamos, pero hemos buscado y sin encontrar nada; La Tierra es el único lugar donde sabemos que hay vida. ¿La Tierra es especial? Me interesaba conocer la respuesta desde niño, y sospecho que el 80% de los presentes ha pensado lo mismo y quiere saber la respuesta.