Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

About 18 months ago, we discussed a mysterious “dark flow” that was seen in early releases of the data from the Wilkinson Microwave Anisotropy Probe data. At that time, we remarked that it was little ...

Add Futurism (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. The ...

A: When photons scatter off electrons moving toward us, the photons gain energy; when photons scatter off electrons moving away from us, they lose energy. This effect is called the kinematic ...

WASHINGTON — Using data from NASA’s Wilkinson Microwave Anisotropy Probe (WMAP), scientists have identified an unexpected motion in distant galaxy clusters. The cause, they suggest, is the ...

Receive emails about upcoming NOVA programs and related content, as well as featured reporting about current events through a science lens. How can we be so bold? The key is to make use of our ...

As if the mysteries of dark matter and dark energy weren't vexing enough, another baffling cosmic puzzle has been discovered. Patches of matter in the universe seem to be moving at very high speeds ...

There is a force called “dark flow” that exists outside our universe, and it’s tugging several galaxy clusters at 2 million mph toward an empty spot in space between Centaurus (pictured) and Vela.