The last refuge for Martian life, if it exists, might be deep below the planet’s surface and beyond the reach of any currently planned missions, according to a new study. After mapping cosmic radiation levels at various depths on Mars, researchers have concluded that any life within the first several yards of the planet’s surface would be killed by lethal doses of cosmic radiation. Unlike Earth, Mars is no longer protected by a global magnetic field or thick atmosphere. As a result, the planet has been vulnerable to radiation from space for billions of years. . . . Etc.

FLASHBACK:      MON       TUES       WED       THU       FRI            FAR OUT BLOG