Blue Origin, the space company founded by Amazon chairman Jeff Bezos, shared a cryptic photo of famed explorer Ernest Shackleton's expedition in a tweet on Friday.
Shackleton's ship "Endurance" during the explorer's attempt to make the day.
Shackleton's expedition and Blue Origin's bid to send astronauts back to the surface of the moon first land crossing of the Antarctic more than a century ago. But Shackleton is also the name of a crater on the moon's surface. And it's not just any crater. NASA named the crater for the famed explorer in 2006 due to its potential as a lunar outpost.
The presence of "water ice," as NASA calls it, is key to any plan to return to the moon. This is how NASA administrator Jim Bridenstine says so with a permanent presence.