On 25 November 1915, Albert Einstein presented his general theory of relativity at the Prussian Academy of Sciences. This theory is still considered to be the most important idea in modern physics.

A teacher whose students won last year’s competition shares the steps she followed. (Spoiler: It ends with the whole class doing the worm.) By Baylea Jones Educators, parents and district ...

Widespread ocean pollution threatens the health of more than 3 billion people, international study led by Boston College researchers shows Ocean pollution is widespread and getting worse, and when ...