https://www.cnbc.com/2019/04/26/jeff-bezos-blue-origin-shackleton-photo-tweet-may-be-lunar-outpost.html

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.

But, with only the date of May 9 in the photo's caption, the company left the context for the post unexplained. One likely meaning is the possible connection between Shackleton's expedition and Blue Origin's bid to send astronauts back to the surface of the moon.