噢对了。还有地磁反转呢。

Oh yes, and there's geomagnetic reversal.

youdao

当然，有些事实证据是有效的，比如玛雅人的确有一个长记历的历法，地磁反转理论也的确存在，太阳活动的确在减弱等等。

Certainly, some of the facts at hand are valid; for example, the Maya did have a Long Count calendar, pole-shift theory does exist, and solar activity does wax and wane.

youdao

并指出系统的混沌特性可以用来模拟地磁场的反转。

The chaotic behavior of the system can be used to simulate the reversals of the geomagnetic field.

youdao