Manhole covers are round for a mix of safety, engineering, and practical reasons. A circular cover can't fall through its opening, regardless of rotation, making it safer for workers and pedestrians.

A SpaceX Falcon 9 rocket carrying 29 Starlink satellites launched from Cape Canaveral Space Force Station in Florida on Wednesday (March 4), creating a sky show for early risers. Test your knowledge ...

Neuroscience examines the structure and function of the human brain and nervous system. Neuroscientists use cellular and molecular biology, anatomy and physiology, human behavior and cognition, and ...

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