Most of the universe is missing. Only 5% of it is normal matter, which makes up all the people, planets and stars we can see; the other 95% consists of mysterious dark matter and dark energy.

Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New findings risk turning the tension into a crisis, scientists say. When you ...

Attention Is Discovery: The Life and Legacy of Astronomer Henrietta Leavitt by Anna Von Mertens. MIT Press, 2024 ($34.95) Fans of Hidden Figures and The Glass Universe will appreciate Anna Von Mertens ...