This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...
Morning Overview on MSN
How gravity sculpts the universe from Einstein to cosmic magnifying lenses
From the fall of an apple to the glow of the farthest known star, gravity quietly choreographs almost everything that happens ...
The mystery of dark matter—unseen, pervasive, and essential in standard cosmology—has loomed over physics for decades. In new ...
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