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.

JIM PEEBLES is widely known as the architect of modern cosmology – and its nice-guy-in-chief. Awarding his half-share of the 2019 Nobel prize for physics, the committee said he “took on the cosmos”, ...

The papers of William C. Sturtevant were processed with the assistance of a Wenner-Gren Foundation Historical Archives Program grant awarded to Dr. Ives Goddard. Digitization and preparation of these ...