Magnetite is the most magnetic natural metal on earth.

磁铁矿是地球上最具磁性的天然金属。

This magnetite basically helps them to orient in the right direction.

这种磁铁矿基本上可以帮助它们以正确的方向定向。

Like peanuts, magnetite is more dense and should sit at the bottom.

像花生样，磁铁矿的密度更大，所以应该位于底。

The first theory is that animals have tiny magnetite particles in their bodies that act as magnetic receptors.

第论是，动物体内有微小的磁铁矿颗粒，作为磁感受器发挥作用。

Which, again, are magnetite. Over here are iron oxide.

又是磁铁矿。这里是氧化铁。

If the house was built on magnetic ore...

要是这房子下面有磁铁矿。

What they didn't know at the time was they had passed by a succession of magnet mines.

他们哪里知道他们经过的是座座的磁铁矿山。

A lot of homing pigeons also have what is called magnetite in their beaks and magnetoreceptors in their nervous system or brains.

很多信鸽的喙中也有所谓的磁铁矿，神经系统或大脑中有磁感受器。

The same process could also explain why volcano scientists find that the mineral magnetite rises to higher layers in Earth's crust than would be expected.

同样的过程也可以解释为什么火山家发现矿物磁铁矿在地壳中能上升到比预期更高的层。

Magnetic fields pass invisibly through the entire body so researchers don't know exactly where these magnetite particles or cryptochromes would be attached to particular cells and so mistakes are made all the time.

磁场无形地穿过整身体，所以研究人员不知道这些磁铁矿颗粒或隐色体会准确地附着在特定的细胞上，所以导致犯错。