Optical Illusion: Is the black hole expanding, or is it staying still? - Hindustan Times

The optical illusion shows a black hole in the centre that seems like it keeps expanding.  | Trending

Optical illusions have been around forever and are fun to solve. They trick our eyes and brains into seeing something that doesn't exist in reality. While some of them are headscratchers, others are … [+1970 chars]

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