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A Black hole is a place in space where gravity pulls so much that even light can not get out. They are one of the greatest mysteries in space. Take this quiz adn find out how much do you really know about Black holes!
240 million around the globe speak Portuguese, find out if you know the basics of the 6th most spoken language in the world and build up your Dreevoo knowledge profile.
Scientist may be an expert in one or more areas of science. Some of them have decisively influenced on the development of mankind. Let see how many of them you know.
