NASA’s leading planet-hunting spacecraft has spotted its second planet that matches Earth’s size and may … “Astronomers find 2nd Earth-size planet in intriguing alien solar system”

It’s been well over 100 years since Einstein presented his theory of General Relativity, and … “Black Hole Mergers Test the Limits of General Relativity”

Earth’s day length varies by several milliseconds over decades, and a new model suggests the … “Earth’s inner core may be quietly changing the length of our days”