Topic: mass

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How to build a balancing bridge out of coins without glue

Build a bridge of coins that can balance off the side of a table without glue. This video from The Q demonstrates the stacking process with around 200 coins. Can you make something similar with fewer coins, or somethi...

Why every picture of a black hole is an illustration – Vox

No one has ever seen a black hole. There have been illustrations and computer simulations, but not even astronomers have seen a black hole... yet. In the spring of 2017, we might see... something. As a part of...

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