We are finding that mergers do not appear to play the dominant role in star formation, because we see normal-looking, undisturbed galaxies that are undergoing large amounts of star formation.

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Having the infrared data from Spitzer allows us to measure the star formation rates very accurately because we are no longer blinded by dust.

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This is an exceptional period of time for astronomy, because for the first time we are able to combine data from almost all of the important wavelengths.

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