"Dark comets," which are near-Earth asteroids that behave like comets and could contain water ice, have mostly come from the asteroid belt between Mars and Jupiter and could make up as much as 60% ...

IT STINKS. AND FOR YEARS NOW, HER AND HER HUSBAND HAVE DRANK BOTTLED WATER INSTEAD. BUT SHE SAYS IT’S NEVER LOOKED AS BAD AS IT DID TODAY. IT’S AS DARK AS COFFEE, BUT REALLY, THIS IS BATH WATER.

A new study casts doubt on a phenomenon that was previously believed to show water flowing on the surface of Mars. Since the 1970s, scientists have studied dark streaks seen on Mars' cliff sides ...