Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with supermassive black holes, surrounded by ... X-Ray Flashes from a Nearby Supermassive Black Hole ...

This fact sheet relies on people self-identifying their race and ethnicity in the Census Bureau’s 2023 ACS to describe the nation’s Black population. The racial and ethnic categories used in census ...

Research & Development, Beiersdorf AG, Hamburg, Germany.. Dandruff represents a common scalp disorder affecting half of the world’s population regardless of gender or ethnicity [1]. In contrast to ...

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