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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Russian missiles kill at least 21 in Ukraine's Odesa region

Russian missile attacks on residential areas killed at least 21 people early Friday near the Ukrainian port of Odesa, authorities reported, a day after the withdrawal of Moscow's forces from an island in the Black Sea seemed to ease the threat to the city.

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