An artist's concept of multiple types of subatomic particles. Forget about turtles; for all practical purposes, it’s really particles all the way down. Consider the seemingly simple matter of their ...
For decades, astronomers have searched for something they cannot see. They call it dark matter—an invisible substance thought ...
The dark object has a mass a million times greater than our sun's is located 10 billion light-years away and has no stars. A "dark object" detected as an anomalous notch in the arc of a ...