What is the universe made of? How did it begin? Will it ever end? In recent decades, physicists have produced dramatic new answers to these ancient cosmological questions. They're also exploring new mysteries about the nature of dark matter and dark energy, the story of the big bang singularity, and the shape and structure of spacetime itself.

Perimeter researchers expand what we know about the universe by developing new theories and by collaborating on international experiments involving the most powerful astronomical observational instruments in existence. Exploring the cosmos takes more than telescopes. Cosmology also informs other Perimeter research areas, including particle physics, quantum fields and strings, and strong gravity.