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Showing results for tags 'how do we know'.
Black Holes Explained - 5 Ways To Know They Exist Black holes are one of the most mysterious objects we have ever discovered. They cannot directly be observed with our current technology. Then, how do we know that they exist? Here are 5 ways to discover the existence of a black hole. WARNING: The explanation is very simple and easy to understand..
Dark Matter Explained - How Do We Know It Exists? Understanding existence of dark matter is a lot easier than understanding itself. It is still a mystery, because we still DON'T KNOW what it is. It is completely invisible and undetectable with current technology. Then how could we know about its existence? Moreover, how can we know how much dark matter there is? Let's find out..