Tiny grains from a distant asteroid are revealing clues to the magnetic forces that shaped the far reaches of the solar ...

NASA’s MESSENGER spacecraft captured the image at left, an approximation of Mercury’s true color as might be seen by the human eye, on Oct. 6, 2008. On May 9, 2016, Mercury passed directly between the ...

THE quote ‘We have two ears and one mouth so that we can listen twice as much as we speak’ is attributed to Epictetus, a ...