Why is the expansion of our Universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...

What is the universe made of? How did it begin? How has it evolved over the 13.8 billion years since its origin? These are some of the questions addressed by cosmology, the study of the universe as a ...

When NASA's Voyager 2 spacecraft flew by Uranus in 1986, it provided scientists' first—and, so far, only—close glimpse of ...

We preselected all newsletters you had before unsubscribing.

It’s your new favorite source for the strangest science-adjacent facts, figures, and Wikipedia spirals the editors of Popular Science can muster. If you like the stories in this post, we guarantee you ...

A monthly column recounting the diagnosis of a puzzling medical case. By Sandra G. Boodman. Submit solved medical mysteries to [email protected].