Morning Overview on MSN
What physics really says about time travel possibilities
Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...
Astrum on MSNOpinion
What Einstein’s time dilation really means for human lifespans
Time is often treated as constant, but Einstein showed that it isn’t. Speed and gravity both affect how fast time moves, and ...
Tracking time is one of those things that seems easy, until you really start to get into the details of what time actually is. We define a second as 9,192,631,770 oscillations of a cesium atom.
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