In addition to an unstable, weakening magnetic field, scientists have found that the magnetosphere, a magnetic bubble that surrounds and protects our planet, is gradually thinning.
除了地球磁場不穩、磁力變弱外，科學家也發現，在地球外圍、像肥皂泡般保護地球的磁氣圈，也在漸漸變薄中。