Gravity used to be the most dependable rule in the cosmic rulebook, the quiet background force that never changed its mind.

This strange 'gravity hole' beneath Antarctica could help explain how its ice and oceans changed over millions of years.

For nearly a century, astronomers have watched galaxies spin and the universe expand in ways that visible matter alone cannot explain. The dominant answer has been dark matter, an unseen substance ...

Cooling metal bars to near absolute zero, suspending microscopic gold beads, or searching for signs that gravity might be quantum: meet the scientists hunting for gravity's elusive nature ...