"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these ...

From the surprising truth about vegetables to the hidden secrets of figs and the origins of McDonald's drive-thru, these fun facts will leave you amazed and enlightened. Get ready to see the world ...

Life aboard a nuclear submarine is a strange mix of advanced technology and extreme confinement. Crews can stay submerged for months because they generate their own oxygen through electrolysis and ...