Magnetite is the most magnetic natural metal on earth.

铁矿是地上最具性的天然金属。

The turtles have particles of magnetite, a magnetic mineral, in their brains.

海龟的大脑中有铁矿颗粒，这是一种性矿物。

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

这种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.

像花生一样，铁矿的密度更大，所以应该位于底部。

The magnetite likely plays a role in orienting sea turtles to Earth's magnetic poles, similar to a compass.

铁矿可能在将海龟定向到地方面起作用，类似于指南针。

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

第一个理论是，动物体内有微小的铁矿颗粒，作为感受器发挥作用。

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

又是铁矿。这里是氧化铁。

If the house was built on magnetic ore...

要是这房子下面有铁矿。

The very first magnets that anyone knew about were natural magnets called lodestone or magnetite.

人们所知道的第一个铁是天然铁，称为石或铁矿。

Third, it just doesn't make sense that bacteria on Mars would produce magnetite.

第三，火星上的细菌会产生铁矿是没有意义的。

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一座座的铁矿山。

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铁矿，神经系统或大脑中有感受器。

Earth bacteria have the magnetite grains because they allow them to follow the Earth's strong magnetic field.

地细菌具有铁矿颗粒， 因为它们使它们能够跟随地的强场。

It's much too weak to follow, which means that magnetite grains would be completely useless to Martian bacteria.

它太弱了，无法追踪，这意味着铁矿颗粒对火星细菌来说完全没有用处。

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科学家发现矿物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.

场无形地穿过整个身体，所以研究人员不知道这些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。