Science/Facts/?/Exercise

Which of the following statements are scientific facts? To which science do they belong? On what does its validity or invalidity rest?

1. Smoking is dangerous for the health.
2. Dinosaurs became extinct some 65 million years ago.
3. Dinosaurs did not die out at all.
4. Such a thing as a dinosaur never existed.
5. The gospels were written by eyewitnesses.
6. The ${}abc$-conjecture is now a theorem.
7. The ${}abc$-conjecture is still a conjecture.
8. The theory of relativity is confirmed.
9. It is not possible to make gold out of other materials.
10. The world will soon perish.

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