<P> Believing that Gardner has died, a grieving Nathaniel and Kendra let out their rage at one another . After discovering that no bodies were found in the wreckage, they receive some devastating news - Gardner's body contains dangerously high levels of troponin, meaning that he has an enlarged heart . His heart is unable to stand Earth's atmospheric pressure and so Gardner must be returned to Mars immediately if he is to survive . The search is resumed with renewed fervor and they discover CCTV footage of Gardner and Tulsa in a supermarket parking lot, where they have bought clothes and supplies for the journey . During the journey, Gardner tells Tulsa the truth - that he was born and raised on Mars . Unwilling to accept the truth, she forces him out of the car but forgives him once he promises never to lie to her again, although she still does not believe him . </P> <P> At night, they camp out under the stars, where they make love . In the morning, they are discovered by a follower of Shaman Neka and are brought to him . He agrees to help them . Gardner's nose starts bleeding, a fact he conceals while Tulsa accesses the records to get the location of the beach house, which is in Summerland, California . </P> <P> Before they begin their journey, they make a detour to Las Vegas . Gardner's nose starts to bleed again and he collapses and is taken to a hospital . After seeing the carbon tubes in his bones on the results of an X-ray at the hospital, Tulsa tells Gardner she now believes he was born on Mars, but plans to leave him in the hospital, before foster care can come, as he is too sick to continue their journey . Gardner reveals that he knows he won't last on Earth anymore and all he wants is to meet his father before he dies . Tulsa gives in and helps him escape . They steal a car and drive to the beach house . There, they meet the man from the video, who reveals that he is not Sarah Elliot's husband, but her own brother . However, he thinks that the two are lying to him . Gardner runs down to the sea, where he tells Tulsa that this is where he wants to die . He collapses . Tulsa tries frantically to drag him to the shore, but he is too heavy for her . Nathaniel and Kendra arrive just in time to save him . After Nathaniel performs CPR on him, Gardner asks him about his mother Sarah and reveals that he knows that Nathaniel is his real father . Nathaniel, Kendra and Tulsa rush Gardner to a Dream Chaser . They plan to launch into the stratosphere to stabilize him . When that proves to not be enough, a desperate Nathaniel takes control and launches into outer space . Free of Earth's gravity, Gardner is revived . </P> <P> Soon, Gardner boards a space shuttle to Mars . Tulsa and Gardner have an emotional parting . Kendra, who is staying on Earth because she is retiring from NASA, adopts Tulsa . Determined to join Gardner on Mars, she joins Kendra's training program . Back on Mars, with his father Nathaniel, Gardner is glad to be home . </P>

Does the boy die in the space between us