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| Popular Question | Asked a question with 1,000 views. This badge can be awarded multiple times. |
Thomas O earned this badge 7 times |
feb 4 at 22:04
Why is the universe so big?
jan 7 at 8:45
What causes compressed air (from “Dust Off” cans) to freeze, but only when turned upside down?
nov 11 at 1:26
Newton's rings: What causes the other rings?
may 5 '12 at 8:01
How efficient is an electric heater?
mar 27 '12 at 14:55
Why is a 1mW laser dangerous?
dec 15 '11 at 16:38
Why does GPS depend on relativity?
