Have you ever wondered why you look up and see a dark sky at night? Help share science with the world: http://translate.minutephysics.com Subscribe to Minute...
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Make sure to watch this full-screen with the sound on! Featured on the National Geographic News: http://newswatch.nationalgeographic.com/2012/04/03/new-starry-time-lapse-a-tribute-to-sky-watchers/ The evening twilight gently fades in to darkness.
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Astronomy | Brad Goldpaint | We live on a spinning ball, rotating madly as it moves through space.
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Rayleigh scattering, and why the is sky blue... and yield white near the horizon. Via Patrice AFRIAT
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New research demonstrates that fruit flies keep their bearings by using the polarization pattern of natural skylight, bolstering the belief that many, if not all, insects have that capability.
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A great topic to discuss with the more curious children, and very relevant to The Dark Emperor. However, this explanation would go way over their heads, so it would be best for a teacher to tackle this first, then put it in more simpler terms for the students. I have confidence that children can understand why it is dark at night, it is simply a matter of phrasing it that is understandable for them!