The Magnetic North Pole is where compass needles point.

而磁北极是指南针的指针所指方向。

Okay, so the gate has a really strong electromagnetic field, and that can change the directions of a compass needle.

入口有很强的电磁场会扰乱指南针的指向。

Because Earth behaves like it has a giant bar magnet in it, and your compass needle will point north towards Earth's magnetic pole.

因为地球的内部就像有一个巨大的条形磁铁，而你的指南针会向北指向地球的磁极。

Yet it was there, making the compass needle move.

然而它就在那里， 使罗盘针移动。

In fact, around 800,000 years ago, if you were facing north, the compass needle would point to the south.

事实上， 大约在 80 万年前， 如果你面朝北方，罗盘指针就会指向南方。

His dad explained that the earth is like a big magnet that's always pulling on the compass's magnetic needle.

他爸爸解释说， 地球就像一块大磁铁， 一直在吸引着指南针的磁针。