What if one of the most famous and formidable Antarctic exploration vessels in history, whose crew's story of shipwreck and survival has been told for more than a century, wasn't as strong as legend had it? A new research paper about the vessel Endurance casts doubt on some common beliefs about explorer Ernest Shackleton's ship, particularly that it was one of the most well-built ships of its era and that it went down due to the loss of its rudder after becoming trapped in sea ice in 1915.