Mars Through Hollywood's Eyes

In Paul Verhoeven's 1990 sci-fi classic Total Recall, Mars is a grimy, oxygen-deprived colony run by a corporate tyrant, where mutants scramble for breathable air and a mysterious alien machine promises to terraform the entire planet in minutes. It's campy, violent, and wildly fun. But if you set the action sequences aside and ask a serious question — what would actually happen if that Mars were real? — the answers are fascinating.

Let's run the film's biggest ideas through the filter of real Mars science.

The Atmosphere Problem: Mars Is Even Thinner Than the Movie Suggests

The film opens with colonists living under domed habitats, rationing air sold by the Cohaagen Corporation. That part, at least, captures a genuine truth. Mars has an atmosphere roughly 1% as dense as Earth's, composed of about 95% carbon dioxide, 2.6% nitrogen, and 1.9% argon. Surface pressure averages just 600 pascals — compare that to Earth's 101,325 pascals at sea level.

In the movie, exposure to Mars's atmosphere causes faces to swell grotesquely and eyes to bulge. The real consequences of unprotected exposure would be equally lethal, though less cinematic. Without a pressure suit, a person on Mars would experience hypoxia, ebullism (the boiling of bodily fluids at low pressure), and rapid hypothermia. Temperatures average around -60°C (-76°F), with lows reaching -125°C (-193°F) near the poles. You wouldn't survive long enough to look very dramatic about it.

Could an Alien Reactor Actually Terraform Mars?

The film's climax involves activating an ancient alien reactor buried inside Olympus Mons — the largest volcano in the solar system, standing 21.9 km high and spanning roughly 600 km across — which flash-terraforms Mars by releasing oxygen into the atmosphere in a matter of minutes. The scene is spectacular. The science is, charitably, optimistic.

Real terraforming proposals are measured in centuries, not minutes. A 2018 study published in Nature Astronomy by Bruce Jakosky and Christopher Edwards concluded that there isn't enough accessible CO₂ on Mars to terraform it to Earth-like pressures using currently known methods, even if we released every reservoir of carbon dioxide on and beneath the surface. The total available CO₂ could roughly double Mars's atmospheric pressure — still far below what humans need to breathe unassisted.

Generating a breathable oxygen atmosphere would require either massive biological processes (think engineered cyanobacteria over thousands of years) or industrial-scale electrolysis. NASA's Perseverance rover has already demonstrated a proof of concept: the MOXIE instrument produced about 6 grams of oxygen from Martian CO₂ during testing in 2021. Scaling MOXIE up to terraforming levels is a leap that makes the alien reactor seem almost reasonable by comparison.

Martian Colonies: Domes, Tunnels, or Both?

Total Recall's colony is a dense, underground-and-domed urban sprawl. Conceptually, this aligns reasonably well with serious architectural proposals for early Martian settlements. Mars receives about twice the radiation dose that the ISS experiences, thanks to its thin atmosphere and lack of a global magnetic field. Underground habitats or structures built under several meters of regolith would provide meaningful shielding.

NASA's current Artemis and long-range Mars planning documents favor modular pressurized habitats, potentially supplemented by lava tube shelters — naturally occurring underground voids that may span hundreds of meters. The European Space Agency has similarly explored 3D-printed regolith structures as radiation barriers. So Cohaagen's tunnels aren't pure fantasy; they reflect genuine engineering logic.

What the Film Actually Got Right

  • Air as a scarce resource: Any Mars colony will depend entirely on produced or imported oxygen. Air rationing, while dystopian, is a real logistical challenge engineers take seriously.
  • Low gravity effects: Mars gravity is 38% of Earth's. The film doesn't dwell on this, but long-term low-gravity exposure causes bone density loss and cardiovascular changes — a major unsolved problem for colonists.
  • Corporate and geopolitical tension: Serious Mars policy discussions already grapple with questions of resource rights, governance, and who controls critical infrastructure under frameworks like the Outer Space Treaty of 1967.

The Bottom Line

Total Recall got Mars wrong in the details — no ancient alien reactors, no five-second terraforming, and no melodramatic decompression faces. But the film grasped something real about what Mars colonization will actually mean: resource dependency, political power, and the fragility of human life on an alien world. Those aren't just good movie themes. They're the questions that real mission planners, ethicists, and future colonists will have to answer. And honestly? That's more gripping than anything Schwarzenegger could deliver with a one-liner.

Frequently Asked Questions

Could Mars be terraformed as fast as in Total Recall?

No. The film's minutes-long terraforming is pure fiction. Real proposals span centuries, and a 2018 study found there isn't enough accessible carbon dioxide on Mars to reach Earth-like pressure even if every reservoir were released.

What did Total Recall get right about Mars?

It captured real challenges: air as a scarce, rationed resource, the value of underground or domed habitats for radiation shielding, and the political tension over who controls a colony's critical infrastructure.

What would happen if you were exposed to Mars's atmosphere?

Unprotected exposure would be quickly fatal through hypoxia, ebullism — the boiling of body fluids at very low pressure — and extreme cold, though the real effects would be less theatrical than the film's bulging-eyes depiction.