Is the Universe truly infinite in size?

As far as we can tell, there's no limit to how far it goes on; only a limit to how far we can see. Could the Universe truly be infinite?

25 items which may be representative America, ...whether we like it or not.

For the first live test of an atomic weapon, an unusual encampment sprung up in the New Mexico desert.

Before Hannah Arendt defined the nature of totalitarian evil, she worked against it at the risk of her own safety.