An average of seventy-four species become extinct every day, which was one good reason but not the only one to hold someone's hand. Nicole Krauss
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 serve us right! Larry Niven
Now that mobile phones and the internet have altered the epistemic selective landscape in a revolutionary way, every religious organisation must scramble to evolve defences or become extinct. Daniel Dennett
If man doesn't learn to treat the oceans and the rain forest with respect, man will become extinct. Peter Benchley
The danger of asteroid or comet impact is one of the best reasons for getting into space ... I'm very fond of quoting my friend 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 serve us right!" Arthur C. Clarke
Without retaliation, evils would one day become extinct from the world. Nigerian Proverb