The Back to the Future trilogy features multiple different timelines, each defined in some way by the actions of its characters.

A solar eclipse recorded in ancient China more than 2,700 years ago is helping scientists refine measurements of Earth’s rotation and investigate the Sun’s past behavior.

At some point, you’ve probably heard the phrase “since time immemorial”. Probably you assumed it referred to some hand-wavey, far-distant time; literally the limit of history, past which not even oral ...

Scientists rebuilt the face of “Little Foot,” a 3.67-million-year-old fossil, uncovering new clues about early human ...