Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

Physicists from Trinity College Dublin believe new insights into the behavior of light may offer a new means of solving one ...

Mars, often depicted as a barren red planet, is far from lifeless. With its thin atmosphere and dusty surface, it is an ...

Hubble has revealed a strange cosmic object called Cloud-9, a dark matter–dominated cloud with no stars at all. Scientists ...

NASA’s Hubble has examined Cloud-9, a strange object with no stars that offers clues about early galaxy formation and dark ...

A newly discovered celestial object may be a starless cloud that could change how astronomers understand dark matter.

Behavioral economist Katy Milkman explains why most New Year’s resolutions fail and shares how science-backed strategies can build habits that last. From Agency Chaos to Dark Energy Shocks: How ...

19. The largest known prime number contains 41,024,320 digits. 20. Frogs breathe and drink through their skin. 21. A bullet ...