Quiz yourself: Jeopardy’s hardest first-tier questions
1683: Antonie van Leeuwenhoek writes a letter to the Royal Society describing "animalcules," the first known description of protozoa.
The U.S. Constitution is signed, the Civil War sees the bloodiest battle in American history, the prototype space shuttle Enterprise is unveiled, and the Camp David Accords bring peace between Egypt and Israel, all on this day.
An Alaska Airlines flight bound for Lihue was hit by lightning Thursday night.
The underwater drone scanning for traces of Malaysia Airlines Flight 370 should complete its task within the next week, as the search for the plane intensifies, a government official said Saturday.
"Today and tomorrow, it's imperative that we focus be...