Monday, April 12, 2010

What is time?

Time is the duration between events.

An interesting question is why is there a duration between events? Why doesn't everything happen at once?

If everything happened at once then the universe would be created, evolve and die out all at the same time.

That seems impossible. Chemical reactions take time. Eating takes time. Moving takes time.

On the other hand, thanks to Einstein, we know that time itself is relative. The faster something travels, the less time it experiences compared to something else travelling slowly.

So if you travelled at the speed of light, everything around you would appear to happen all at once. You wouldn't see any duration between events. People would be born, live and die in the same instant.

Interestingly, to them you would appear ageless and unchanging.

The more I think about time the more my brain starts to hurt.

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