When you gaze up at the night sky, it’s easy to feel as though you’re looking into an endless, empty canvas sprinkled with distant, tiny lights. Our solar system feels vast, our galaxy immense. But ...

Nearly everything in the universe is made of mysterious dark matter and dark energy, yet we can’t see either of them directly. Scientists are developing detectors so sensitive they can spot particle ...

Our universe appears flat—but this observation still leaves plenty of options for its true shape. In fact, our cosmos could ...