Became Quote by Larry Niven

The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll…

— Larry Niven

Dinosaurs are extinct today because they lacked opposable thumbs and the brainpower to build a space program.

— Neil deGrasse Tyson

Why dinosaurs are extinct.

— Alla

The dinosaurs disappeared because they could not adapt to their changing environment. We shall disappear if we cannot adapt to an environment that now…

— Arthur C. Clarke

The Cretaceous-Paleogene extinction was a horrible event. Dinosaurs and many other animals and plants were killed.

— Liu Cixin

Dinosaurs may be extinct from the face of the planet, but they are alive and well in our imaginations.

— Steve Miller

Theres no environment I can think of that would have remained constant enough to preserve dinosaur DNA.

— Hendrik Poinar

I was watching Discovery Channel the other day, and you know that they have come up with a new theory about how dinosaurs was…

— Jay Leno

There's no environment I can think of that would have remained constant enough to preserve dinosaur DNA.

— Hendrik Poinar

We live in a time where we have more extinction happening on our planet than since the dinosaurs were wiped out 50 million years ago.

— Jeff Corwin

Kiss me if I'm wrong but dinosaurs still exist right ?

— RMKATTA

Man, I so sick of dinosaurs. They wasn't extinct, I'd go out an' kill 'em myself.

— Lawrence Block