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Welcome to Interact, where you can tell us what you think.

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image credit: Kabir Bakie, Creative Commons; larger image

HyperPhysics: Blue Sky and Rayleigh Scattering

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small image credit: NASA/JPL/EO-1 Mission/GSFC/Ashley Davies; small image source; large image credit: Jeff Schmaltz, NASA/GSFC, MODIS Rapid Response; large image source

Earth Observatory: Ash Plume across the North Atlantic

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Rate these Quotations by Famous Physicists

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"If I could remember the names of all these particles, I'd be a botanist." - Enrico Fermi commenting on the profusion of subatomic particles discovered during the early 1950s.

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"The laws of nature are constructed in such a way as to make the universe as interesting as possible." - Freeman Dyson

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Which physics relationship is more important?

How Earth's magnetic field protects us from the solar wind, the stream of charged particles emanating from the sun. (In fact, a strong solar flare during the Apollo mission could have proved fatal to the astronauts.)
How the density of water depends on temperature (enables aquatic life to survive cold winters).



Which unanswered question in physics is more important?

Does the proton decay?
Can string theory be tested experimentally?


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