Some scientists theorize that some, if not all of the mass extinctions that have wiped out thousands of species of life on Earth might be correlated with magnetic reversals.
3
尽管在过去地质时期地磁场发生了多次倒转,但要预测下次倒转将在何时发生也还是不可能的。
Although magnetic reversals have occurred many times in the geologic past, it is not yet possible to predict when the next reversal will occur.