Could ancient space dust reveal mysteries of Earth's early atmosphere?The MarshalltownBy analyzing the chemistry of ancient micrometeorites, or microscopic flecks of meteor that are too small to burn up in the atmosphere and instead ...Hubble Catches Views of a Jet Rotating with Comet 252P/LINEARNews Release Number: STScI-2016-14May 12, 2016For thousands of years, humans have recorded sightings