Ancient ‘Blue’ Mars Lost an Entire Ocean to Space

Mars was once a small, wet and blue world, but over the past 4 billion years, Mars dried up and became the red dust bowl we know today.

But how much water did Mars possess? According to research published in the journal Science, the Martian northern hemisphere was likely covered in an ocean, covering a region of the approximate area as Earth’s Atlantic Ocean, plunging, in some places, to 1.6 kilometers (1 mile) deep. More info

All four stages of the rocket are visible in this time lapse photo of the NASA Oriole IV sounding rocket with Aural Spatial Structures Probe, launched from Poker Flats, Alaska