Hubble identifies unusual wrinkle in expansion rate of the universe

A collection of images from the NASA/ESA Hubble Space Telescope features galaxies that are all hosts to both Cepheid variables and supernovae. (Source: NASA / ESA  / Adam G. Riess (STScI, JHU) via CNN) A collection of images from the NASA/ESA Hubble Space Telescope features galaxies that are all hosts to both Cepheid variables and supernovae. (Source: NASA / ESA / Adam G. Riess (STScI, JHU) via CNN)

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Biden signs landmark gun measure, says 'lives will be saved'

U.S. President Joe Biden on Saturday signed the most sweeping gun violence bill in decades, a bipartisan compromise that seemed unimaginable until a recent series of mass shootings, including the massacre of 19 students and two teachers at a Texas elementary school.

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