If you scroll down, you'll see that none of the articles have comments. So what exactly is so telling about that?
Obviously the whole quote will not fit as a signature, so here it is in context.
"Host Stephen Colbert asked Tyson, who was promoting his new Fox documentary series, “Cosmos,” why he believed that opposing viewpoints were not necessary in every scientific debate.
“That would be a waste of everyone’s time,” Tyson said. “Once science has been established, once a scientific truth emerges from a consensus of experiments and observations, it is the way of the world. What I’m saying is, when different experiments give you the same result, it is no longer subject to your opinion. That’s the good thing about science: It’s true whether or not you believe in it. That’s why it works.”
Tyson, making his show-record 10th appearance on the program, told Colbert that Americans could make any arguments they wished, but he said no one has the right to be taken seriously.
“You get to say the world is flat because we live in a country that guarantees free speech, but it’s not a country that guarantees that anything you say is correct,” Tyson said.
Superstitions/thinking the world was once flat/not thinking washing hands prevented infection etc were not "facts" based on careful observations and experiments through the scientific method.