Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...
This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...
Applied physicists in the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have demonstrated a new ...
Long before quantum mechanics existed, a scientist developed a powerful way of describing motion by drawing an analogy between particles and light.
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