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Ghost is like spirits.
When we say "ghost", we're thinking about a human spirit - after death.
So what makes us human beings special, that we have these spirits/ghost when we die?
Dinosaurs died...

I was watching prehistoric documentaries,
and I'm just wondering if we have explored all seas on earth yet,
even if we have, did the researchers go all the way down to the bottom of the sea? or is...

Magnification = - p/s

So what if magnification = -0.2? Is that image BIGGER or SMALLER than the actual object? Is it inverted or not?

So basically what does the number 0.2 tell me? What does...

I just heard it today in the car, but the voice was so low that I didn't hear the lyrics and what not.
It was a guy singing in a low voice, and it basically repeats for almost the whole song (at...