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Light pollution -- it's not just the bane of light sleepers and frustrated astronomers. It also is tinkering with the biological cycles of all kinds of living things, including us! SciShow takes you behind the glare to understand the...

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Hank explains how quasars and blazars are both the same thing - just oriented differently in respect to us - and how that impacts the way we perceive them and how it also effects the ways we can study them.

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Aatish Bhatia helped write this video! A big thanks for his help! Here's his blogref='http://www.empiricalzeal.com' target='_blank' rel='nofollow'>blog The universe is expanding – this we know from looking at red shifts of distant...

Lasers are incredible narrow beams of light we can use to do everything from cutting metal to operating on people's eyeballs. But even though we came up with the idea on our own, humans didn’t actually make the first lasers.

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Next Generation Science
Standards
Crossc
utting Concept:
Cause and Effect: Events have causes, sometimes simple,...

Animals and plants come in an amazing variety of shapes, sizes and colors. And in some species, they take it pretty extreme to deal with the battles within and between sexes.

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