Scientists have known for 70 years that there is much more mass in galaxies than can be seen. For example, spiral galaxies rotate at speeds that are only possible if the total mass of the galaxy is ...

For a long time, astronomers have noticed that stars rotate too quickly at the edges of galaxies, as if a hidden mass were preventing them from escaping. This observation raises a fundamental question ...

Annie Murphy Paul is the author of the forthcoming book Brilliant: The New Science of Smart. Many of science’s most important breakthroughs, from the discovery of microorganisms to the theory of ...

Observations from the European satellite Gaia allow for the refutation of a controversial alternative theory and support the presence of an invisible component constituting the majority of the ...

Rajendra Gupta receives unconditional research funding from Macronix Research Corporation. He is affiliated with the American Physical Society, Royal Astronomical Society, European Astronomical ...

Editor’s Note: This is part of a series called UChicago Class Visits, spotlighting transformative classroom experiences and unique learning opportunities offered at UChicago. At the top of a mountain ...