(Main spoilers for the 1997 movie under. Psst: The ship sinks.)

Ever since James Cameron’s blockbuster movie Titanic hit film screens in December 1997, followers have been arguing a few particular scene during which Jack (Leonardo DiCaprio) nobly offers up a spot on a makeshift raft to make sure Rose (Kate Winslet), the lady he loves, survives. Uninterested in continually having to defend his creative alternative in opposition to claims that each lovers might have match onto the raft, Cameron determined to re-create the situation beneath managed circumstances in a brand new documentary for Nationwide Geographic: Titanic: 25 Years Later with James Cameron, marking the movie’s quarter-century anniversary.

For the ten folks on the planet who have not seen the movie, Jack and Rose are star-crossed lovers from completely different social strata who’ve the misfortune of consummating their love minutes earlier than Titanic hits that notorious iceberg. (The characters are fictional, supposed to humanize the tragedy by giving us somebody particular to root for.) A lot drama ensues, involving Rose rescuing Jack from a decrease deck because the icy waters strategy and engulf them and leaping off the lifeboat she briefly boarded as a result of she will’t think about leaving Jack behind.

Due to Jack’s cool head in a disaster, they survive Titanic‘s sinking. They find yourself splashing round within the icy waters with the opposite survivors till Jack finds a floating piece of particles and hoists Rose onto the makeshift raft. However when he tries to climb up too, the raft turns into unstable. Unwilling to danger her security, Jack stays within the water, clinging to the raft’s edge, and slowly freezes to dying. Rose is rescued. Many diehard romantics have been outraged at being robbed of their fairy story ending, prompting heated debates and speculative theories about how Jack may need survived within the water lengthy sufficient for them each to be rescued.

Cameron’s dedication to getting each final historic element proper for Titanic is known—a lot in order that it led astrophysicist Neil deGrasse Tyson to take concern with the astronomical particulars depicted within the authentic movie as Rose is floating on the open ocean, wanting up on the stars. Cameron recalled receiving “fairly a snarky electronic mail” from Tyson stating that we all know the exact latitude and longitude for that day and time in 1912 and that the star area was incorrect. Tyson despatched him the proper star area, and Cameron (to his credit score) made the change within the 3D re-release of the movie.

However the query of whether or not Jack might have additionally been saved did not have the identical definitive reply. That is one purpose it is nonetheless a matter of heated debate.  It was even the topic of a 2012 episode of Mythbusters. Co-hosts Adam Savage and Jamie Hyneman carried out their very own experiment and concluded that each Jack and Rose might have shared the raft and survived, supplied they propped their higher our bodies upright, and discovered the right way to connect Rose’s lifejacket beneath it to extend the buoyancy. Cameron additionally appeared within the episode, telling the duo he thought they have been “lacking the purpose” and weren’t accounting for simply how troublesome it will be to tie a lifejacket onto a floating piece of particles underwater when the water is 28° F.

“Had he lived, the ending of the movie would have been meaningless,” Cameron advised Vainness Honest in 2017 on the movie’s twentieth anniversary. “The movie is about dying and separation: He needed to die. So whether or not it was that, or whether or not a smoke stack fell on him, he was happening. It is referred to as artwork, Issues occur for creative causes, not for physics causes.” Cameron stated he spent two days on set testing the wooden within the water to get simply the correct amount of buoyancy. He reasoned that Rose could not be immersed within the 28° water if she was going to outlive one to 3 hours earlier than being rescued. And he stated he thought it was “foolish” to nonetheless have the identical debate after twenty years.

It is now been 25 years and Cameron advised the Toronto Solar in December that he had carried out a scientific research to “put this complete factor to relaxation and drive a stake by its coronary heart as soon as and for all.”  Two stunt folks have been chosen to signify Jack and Rose, with matching ages, heights, and weights. They have been outfitted with three inside thermometers to observe physique temperature—if their temps dropped under 95° F, they have been hypothetically useless— and proceeded to check a number of completely different situations with a re-creation of the makeshift raft floating in a tank of chilly water (One hopes the stunt folks have been very effectively paid, as a result of these weren’t snug experiments—even harmful.) Cameron additionally re-created the Mythbusters‘ proposed situation for good measure.