What was invented by Zacharias Jansen?
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Who discovered Uranus?
The Nobel Peace Prize 2016 has been awarded to ______ .
If cos4θ-sin4θ=13 then the value of tan2θ is
Petrodava Dacian Fortress is a famous archaeological landmark in
Chernobyl disaster is the result of pollution by_____________
Which layer of the earth's atmosphere contains the ozone layer?
The 2016 Olympics was held in which city?