What is the greatest invention ever?, What is the world’s most useless invention?, Do you think the person who invented the atomic bomb was happy with his discovery?, Do new inventions always create new problems?, What is the world’s most dangerous invention?, Have you ever thought about inventing anything?, What kind of invention do you think the world needs right now?, What is the world's worst invention?, Who is the most famous inventor you know? What are his/ her inventions?, Are there any inventions you think should be banned? Why?, What invention would you like to see one day?.

Inventions Discussion

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