SCIENCE

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What time is it, and why? | Science

At what we might call the most “fundamental” level, the laws of nature do not much care in which direction time flows. Yet from our point of view, as participants in the physical universe, the…






Northern lights shine over Michigan’s Mackinac Bridge

Northern lights are caused by “collisions between fast-moving particles (electrons) from space” an Earth’s atmosphere.  (REUTERS/Pat Kane) Bright green colors reflected off the Straits of Mackinac – the waterway that flows under Michigan’s Mackinac Bridge, connecting…