All her life, dreams had been her friends. Her dreams were unusually detailed, well-structured, colorful. - Carl Sagan

Faith is clearly not enough for many people. They crave hard evidence, scientific proof. They long for the scientific seal of approval, but are unwilling to put up with the rigorous standards of evidence that impart credibility to that seal. What a relief it would be: doubt reliably abolished! Then the irksome burden of looking after ourselves would be lifted. We're worried - and for good reason - about what it means for the human future if we have only ourselves to rely upon.

«Una señal inequívoca del amor a la verdad — escribía John Locke en 1690 — , es no mantener ninguna proposición con mayor seguridad de la que garantizan las pruebas en las que se basa.» En el tema de los ovnis, ¿cuál es la fuerza de las pruebas?

... [W]hat is the likelihood that only on ordinary star, the Sun, is accompanied by an inhabited planet? Why should we, tucked away in some forgotten corner of the Cosmos, be so fortunate? To me, it seems far more likely that the universe is brimming over with life. But we humans do not yet know. We are just beginning our explorations. From eight billion light-years away we are hard pressed to find even the cluster in which our Milky Way Galaxy is embedded, much less the Sun or the Earth. The only planet we are sure is inhabited is a tiny speck of rock and metal, shining feebly by reflected sunlight, and at this distance utterly lost.