-Murph was male.
-A fallen space probe brings Cooper to NASA.
-The Lazarus Mission never occurred and instead, a series of space probes were sent through the wormhole to transmit data.
-The wormhole was tiny and sphere-shaped so the crew suffers from distortion while going through it.
-The mission only travels to the ice planet.
-Cooper finds a dusty Chinese base camp on the planet so the Chinese had already discovered the ice planet 30 years prior with a 4 man crew & 15 robots.
-They find a laboratory containing a machine, which when turned on reverses the gravity inside the room.
-Professor Brand has spent his whole life trying to solve the gravity equation which would allow Earth to launch a space station saving the lives of many people on the planet. The original story never had scientists on Earth looking to solve such an issue and the NASA base was not built in a centrifuge space station.
-Instead of the evil Dr. Mann showing up, there are aliens and bad robots.
-Everyone on Earth dies but the story does not cut away to show what is happening on Earth.
-The original story takes place entirely from Cooper's point of view. We never see any of the story elements of Murph & Prof. Brand back at home. The original story loses the emotional connection between father & daughter and instead explores much more fully the relationship of Cooper & Brand as it grows.
-A second wormhole is discovered through the Chinese crew's logs. They also eventually encounter orb distortions, possibly creatures that can only interact using gravity.
-The ship finds a space station built outside of space & time. It is an opening leading to the view of the entire universe compressed into a flattened disc. It is implied that they are now outside of space & time, looking from some kind of fifth dimension.
-They also discover a time traveling wormhole the Chinese robots found that goes back to earth but to a different time, a few years after they had left. It's unclear though if the Chinese made it back.
-Cooper arrives back on Earth, two hundred years after he has left and humanity is completely gone from the planet.