Earth's magnetic field

[T_aquaticus]

Found some interesting numbers.

Average radiation dose on Earth: 3-6 mSv/year

Background radiation

Average radiation dose on Mars: 244 mSv/year
http://www.sci-news.com/space/science-mars-radiation-measurements-surface-01629.html

That’s a 50-100 fold increase in radiation dosage on a planet that lacks a thick atmosphere and a magnetosphere.

[Chris_Falter]

And Mars is much farther from the sun, which reduces the intensity of the radiation according to the inverse-square of the distance.

[gbrooks9 (George Brooks)]

Without a rotating core of hot metal, Mars was ultimately doomed. But in a sense, Earth faces the same issues if the Sun lasts longer than Earth’s hot molten core.

Ultimately, we need to find a new home beyond our solar system … or go the way of Forbidden Planet - - one of the great Sci-Fi “documentaries” of Human exploration in the cosmos!

[Skoshland (Scott koshland)]

It may be interesting that with a potential Grand Solar Minimum like the Dalton minimum coming along with the earths magnetic field changes will have on climate patterns in coming years.