Project Hail Mary's ending is wrapped up in science and some major surprises, but the movie also adds a scene not in the original book.

Project Hail Mary touches down in theaters this weekend, and we're now taking a deep dive into the movie's ending and how things play out for Ryan Gosling's Ryland Grace and his alien co-star, Rocky.

Ryan Gosling’s newest costar is high-maintenance, had an entourage around him at all times and required his own wardrobe department on set. He’s also a space alien. “He is in the hotel right now in ...