What Happens to Your Body After 6 Months on Mars?

Mars gravity is 38% of Earth's — enough to keep you oriented but not enough to prevent significant physiological changes. Here's what the science says about a six-month stay on the red planet.

Bone density loss would continue but at a slower rate than in microgravity. Estimates suggest 0.3-0.5% loss per month in Martian gravity compared to 1-2% on the ISS. Cardiovascular deconditioning would be partially mitigated, but heart muscle would still atrophy compared to Earth baseline.

The more interesting effects are neurological. Mars's day length (24 hours, 37 minutes) is close enough to Earth's that circadian rhythms should adapt, but the light spectrum is different. Dust exposure is a serious concern — Martian regolith contains perchlorates that could cause chronic respiratory issues.

For space economy investors, these biological challenges represent a massive market. Every problem listed above needs a solution, and those solutions need to be designed, tested, manufactured, and deployed.