Elon Musk’s Mars Mission Could Be Stalled by Sex and Reproduction in Space
For Elon Musk, colonizing Mars goes beyond exploration—it’s about securing the long-term survival and thriving of humanity. Even as he embarks on a new role leading the “Department of Government Efficiency” (D.O.G.E), his focus on Mars remains steadfast. This is despite strong criticism from Neil deGrasse Tyson, who called Musk’s plan irrational and underfunded.
But funding is not the only wrinkle that needs to be ironed out before colonizing Mars. One major issue that NASA and space scientists have largely overlooked is reproduction. The effects of space travel and varying gravity levels, including Mars’ weaker gravitational pull, significantly impact fertility and ovulation, posing a serious obstacle to human reproduction in space.
Sex in space
The first challenge to reproducing in space is simply the act of sex itself. Sexual intercourse requires partners to remain attached long enough to achieve conception, which becomes difficult in zero gravity. Without gravity, positioning becomes a challenge, and space sickness, along with sweat and other bodily fluids, further complicates matters. Sex in space would likely be “hotter and wetter” than on Earth due to the lack of natural convection to dissipate body heat, and bodily fluids might float as droplets. Men may also experience a “slight decrease” in penis size due to lower blood pressure in microgravity.
In 2006, writer Vana Bonta designed the 2suit to address these issues. This suit allows two or more people to stay in proximity in weightless or microgravity environments, enabling physical intimacy and collaborative tasks. While Bonta and her husband tested it, they struggled, needing eight attempts to even connect to the suit.
Even if two partners could complete intercourse, the problem of ejaculation and sperm reaching the egg remains. While sperm can swim in space, microgravity and space radiation significantly impair sperm motility, making fertilization improbable without further intervention. Startup Space Born United is attempting to bring in vitro fertilization to space, but the challenges don’t stop there.
Exposure to ionizing radiation presents a serious risk to pregnancy. A 1983 Soviet experiment involving pregnant rats in orbit showed that some gave birth to healthy but weaker, smaller offspring with slower mental development. Other rats experienced complications during pregnancy. Ionizing radiation also increases the risk of childhood cancers, and children born to female astronauts may face infertility if their mothers are exposed to too much radiation. This exposure can damage the egg cells of a female fetus, rendering them sterile when they grow.
Sex on Mars
On Mars, where the gravitational pull is 38% of Earths, sex and reproduction will be affected. A low-gravity environment like Mars could impede sperm motility and disrupt embryonic development. Moreover, Mars’ lack of an atmosphere and ozone layer exposes its surface to harmful radiation, which could damage DNA and cause mutations during fetal development.
Even if births were successful, Mars’ harsh conditions would make it an inhospitable place to raise children. Ethical concerns about the welfare of offspring, along with the need for genetic diversity, present significant challenges. A sustainable population would require hundreds of humans, and AI might be needed to match couples based on genetic compatibility to ensure the long-term viability of the colony.
While the vision of colonizing Mars offers exciting possibilities for the future of humanity, it is clear that significant scientific, ethical, and logistical hurdles remain. From the challenges of reproduction in microgravity to the risks posed by radiation, the journey toward establishing a self-sustaining colony on Mars is fraught with complexity.
Even if we overcome the immediate obstacles to human reproduction and survival, the long-term viability of such a colony will depend on addressing issues like genetic diversity, the harsh Martian environment, and the ethical implications of raising children in space. As we push forward with this ambitious goal, ongoing research and technological innovation will be crucial in ensuring that human life on Mars can not only survive, but thrive.