Physicists have taken a gemstone better known for engagement rings and turned it into a laboratory for one of the strangest ideas in modern physics, a phase of matter that repeats in time instead of ...

How to characterize a topological phase is one of the most fundamental issues in the field of topological quantum physics. Conventionally, a topological phase is characterized by a topological ...

Earth's Moon, the planet's only natural satellite, is so close that you can see some of its surface features with the naked eye—but only when it's at least partially illuminated by the Sun. In this ...

The Moon's phases are caused by changing amounts of sunlight reflecting off its surface as it orbits Earth. Lunar eclipses happen during a Full Moon when Earth is between the Sun and Moon. Solar ...