From ancient Greek philosopher Plato to Neo, hero of the dystopian film fantasy The Matrix, humans have long pondered the true nature of reality. Can we trust what we see, taste, touch, smell, and ...

General relativity describes gravitation in a geometrical framework generalizing special relativity and classical mechanics. This term includes theoretical studies of gravity, experimental studies of ...

In simple terms, "bullish" means optimistic about the future trajectory of the stock market, while "bearish" means pessimistic about its future. Many, or all, of the products featured on this page are ...

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Capturing the first image of a supermassive black hole using the Event Horizon Telescope (EHT). This image of the black hole at the center of the nearby galaxy M87 reveals how gravitation affects the ...