Extraordinary claims require extraordinary evidence.

We are star stuff which has taken its destiny into its own hands. The loom of time and space works the most astonishing transformations of matter.

Observation: I can't see a thing. Conclusion: Dinosaurs.

History is full of people who out of fear, or ignorance, or lust for power have destroyed knowledge of immeasurable value which truly belongs to us all. We mus…

The criterion which we use to test the genuineness of apparent statements of fact is the criterion of verifiability. We say that a sentence is factually signif…

I would like to say we're at a point where global warming is impossible to deny. Let's just say that global warming deniers are now on a par with Holocaust den…

Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passion, they cannot alter the state of facts and evidence.