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.

磁场无形穿过整个身体，所以研究人员不知道这些磁铁矿颗粒或隐色体会准着在特定细胞上，所以导致犯错。

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.

同样过程也可以解释为什么火山科学家发现矿物磁铁矿在壳中能上升到比预期更高层。

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

很多信鸽喙中也有所谓磁铁矿，神经系统或大脑中有磁受器。

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

磁铁矿可能在将海龟定向到球磁极面起作用，类似于指南针。

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

海龟大脑中有磁铁矿颗粒，这是一种磁性矿物。

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向定向。

Magnetite is the most magnetic natural metal on earth.

磁铁矿是球上最具磁性天然金属。

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

像花生一样，磁铁矿密度更大，所以应该位于底部。

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

第一个理论是，动物体内有微小磁铁矿颗粒，作为磁受器发挥作用。

And that proof came in the form of a miraculous little mineral called magnetite.

而这种证据以一种被称为磁铁矿神奇矿物形式出现。

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

又是磁铁矿。这里是氧化铁。

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

最早磁铁是天然磁石，称为磁石或磁铁矿。

Between the size of a grain of rice and a small lima bean, a recent discoveries have found calcite and magnetite crystals chips in it or fragments.

大小介于一粒米和一颗小利马豆之间，最近发现表明其中含有解石和磁铁矿晶体碎片。

If the house was built on magnetic ore...

要是这房子下面有磁铁矿。

Lodestone, scientists and humans have known this for hundreds of years, are naturally magnetized pieces of magnetite.

天然磁石， 科学家和人类几百年前就知道，它是自然磁化磁铁矿块。

Basalt is a volcanic rock composed of agite and sometimes plagioclase and magnetite, which says nothing.

玄武岩是一种火山岩， 主要由辉石构成， 有时还含有斜长石和磁铁矿，这些成分本身并无特别含义。

But there's actually a more precise way to tell that Africa was once near the South Pole, and once again, it's magnetite.

实际上， 有一种更精法可以证明非洲曾靠近南极，那就是磁铁矿。

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，这意味着磁铁矿颗粒对火星细菌来说完全没有用处。

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是一座座磁铁矿山。

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

第三，火星上细菌会产生磁铁矿是没有意义。