Because that's what scientists do, they learn the important facts
"I was walking around after work today, and I realized I never even think about the fact that I'm in New York City half the time I'm there. Like, I can see the Empire State Building when I get off the train, but I never thought to look. And then I was walking down 6th Avenue and there were all these people sitting in Bryant Park having coffee, and it was so-" "Remember when we hung out near Gramercy Park?"
"Yup."
"You know who lives near Gramercy Park?"
"No."
"Really? How do you know-"
"With her husband, and her-"
"Why do you know all this?"
"And her two children, and-"
"Stalker."