Astronomers may have discovered a binary pair of supermassive black holes that are doomed to collide 10,000 years from now.
Strange 'domain walls' act like independent quantum object in the new experiment.
The Soviet Union was the world's first communist country and had a major influence on the 20th century — and still has an influence today.
A mountain-sized chunk of volcanic rock under Japan is changing the way that tectonic plates subduct and may be channeling the direction of earthquakes.