[1] Using archived footage and present-day interviews, the film follows the large dome that featured a replica of earth's ecosystem called Biosphere 2, constructed in the Arizona desert.

The site's critics consensus reads: "Spaceship Earth achieves liftoff as an engaging behind-the-scenes record of an audacious experiment -- and settles into orbit as poignant proof of the power of a shared dream.

But he also captures the seriousness of purpose behind what some saw as a giant publicity stunt — and convinces us that this was a one-of-a-kind way to learn some of the things humanity will need to know as this world changes and others are considered for habitation.

The review calls the film a credulous portrayal while having an incomplete narrative, omitting incidents of interpersonal drama and gliding over what transpired following the first round of the experiment.

Steve Bannon, who took over Biosphere 2 in 1993, only appears in the final 15 minutes of the film despite causing the resignation of the original Biospherians and filing criminal charges against Abigail Alling and Mark Van Thillo after they broke into the enclosure to warn the second group about him.