Many theories are rock-solid: Scientists have just as much confidence in the theories of relativity, quantum mechanics, ...

A new Big Bang model does away with speculative elements, putting gravitational waves at the forefront of the creation of ...

Scientists have long sought evidence to refute string theory, but a new test seeks to disprove key aspects with help from the ...

Researchers say they discovered evidence that early Earth was home to more hydrogen than previously thought, calling into question widely held beliefs about the origins of water and the planet’s ...