Smithsonian Magazine1d
An Enormous, Branching String of Galaxy Clusters Is the Largest Known Structure in the Universe, Scientists Say
The cosmic superstructure Quipu is more than 13,000 times the length of the Milky Way, and its mass is 200 quadrillion times ...
Satellite Photo Captures Chinese Nuclear Submarine's Weapons System
The Chinese Type 093B is classified by the U.S. military as a guided-missile nuclear-powered attack submarine.