1. Mars Has No Global Magnetic Field
On Earth, our strong magnetic field acts as an invisible shield, deflecting harmful cosmic rays and solar particles away from the surface. Mars, in stark contrast, lost its global magnetic field billions of years ago. Now, its surface sits exposed to a relentless barrage of high-energy radiation from space. NASA research reveals this absence leaves Martian soil—and any future visitors—vulnerable to the universe’s harshest elements.