Astronomers may have finally pinned down why some galaxies stop making stars. At a specific mass, they appear to build a self-supporting halo of hot gas that cuts off the cool fuel needed for new star formation, which results in the galaxy slowly starving itself.

Galaxies do not all age the same way. Some keep forming stars for billions

It’s almost a given that any new product announcement these days is going to tout some form of artificial intelligence wizardry (including gaming PCs), and Logitech’s new $79.99 Mobi Fold mouse is no exception. However, the bigger emphasis is on the rodent’s clamshell folding design. Built for road warriors, the Mobil Fold is Logitech’s first

Physical gift cards for Valve’s popular Steam platform are about to go the way of the dodo bird, and you can thank scammers for their years of abuse. In an update to a Steam support document, Valve confirmed it will not be restocking retailers with more Steam gift cards once they run out of their existing inventories, and that it anticipates