There are no forbidden questions in science, no matters too... - Carl Sagan

"Somewhere, something incredible is waiting to be known."

"You could just as well say that an agnostic is a deeply religious person with at least a rudimentary knowledge of human fallibility."

"The way to find out about our place in the universe is by examining the universe and by examining ourselves - without preconceptions, with as unbiased a mind as we can muster."

"If it can be destroyed by the truth, it deserves to be destroyed by the truth."

"La prueba de ausencia no es prueba de ausencia"