Animals are multicellular eukaryotes – complicated lifeforms, that consume organic material, breathe oxygen and live now as the varied and complex creatures we see all around us.

是多细胞真核生，这些复杂的生命形式，以有机为食，呼吸氧气，并以我们所见的形式多样且复杂的生而存在。

There are so many different kinds of seaweed, there's unbelievable genetic diversity in seaweed, and they're very ancient; they were some of the first multicellular organisms ever to evolve.

海洋中有很多不同种类的海藻，存在着不可思议的遗传多样性，而且们非常古老；们属于最先进化的一部分多细胞生。

They're very old, evolutionarily speaking, and likely resemble some of our first multicellular ancestors.

从进化的角度来看，们非常古老，很可能我们最早的多细胞祖先相似。

With oxygen's role in releasing energy, enabling the release of lots of energy through chemical reaction, it's more useful for animals, and probably led to the evolution of multicellular organisms.

由于氧气在释放能量方面的作用，使其能够通过化学反应释放大量的能量，所以更有用，可能还导致了多细胞生的进化。

Animals are eaters, movers, sexual reproducers, and multicellular... ers.

们能吃，能走，能进行有性繁殖，并有多细胞。

First, they all start as single-celled zygotes — made from a sperm cell and egg cell combo — that become multicellular embryos: the tiny beginnings of roots, stems, and leaves.

首先，们都是从细胞受精卵开始的——由精子细胞和卵细胞组合而成——然后变成多细胞胚胎：根、茎和叶的微小开端。

Even further down at 3,600 meters is the deepest point that a multicellular organism has been found alive — this freaky looking worm.

再往下3600米深处，是目前发现有多细胞生生存的最深处——这种看起来怪怪的蠕虫。

But last summer, an underwater vehicle peeked beneath shelves of volcanic rock in the Pacific and found a bustling community of multicellular organisms.

但今年夏天，一辆水下探测器在太平洋的火山岩层下窥探，发现了一个热闹的多细胞生群落。

Communicating over large distances over time is a problem all multicellular life has had to solve, and it's an incredibly old one.

随着时间的推移，远距离的交流是所有多细胞生命都必须解决的问题，而这是一个非常古老的问题。

At some point, these cells began to form small groups or communities, which lead to multicellular life, and finally, to you.

渐渐，这些细胞开始形成小组或群体，导致了多细胞生命，最终形成了你。

A genome is the haploid set of chromosomes in a gamete, or microorganism, or each cell of a multicellular organism.

基因组是指配子、微生或多细胞生每个细胞中的倍体染色体组。

Ultimately, it gives rise to a sophisticated system of cooperation that's somewhat like a multicellular organism in itself.

最终形成一个复杂、精致的合作系统，有些类似于多细胞生。

The tentacled Archaean uses proteins common to multicellular organisms and might lend insight into how the latter evolved.

这种有触角的太古代微生使用多细胞生共有的蛋白质，这可能有助于我们了解后者进化的方式。

Several years ago, Albani and his team discovered it held the oldest fossils know of multicellular animals.

几年前，阿尔巴尼和他的研究小组发现这里保存着已知的最古老的多细胞化石。

Some people have even suggested that there could be multicellular life, such as fish-like creatures down there.

一些人甚至推测这些寒冷星球上还可能有多细胞生命，比如说像鱼一样的生。

And they can do it because they're multicellular, which is a rarity in the microbial world.

们之所以能够做到这一点，是因为们是多细胞的，这在微生世界中很少见。

But we humans, along with the rest of the multicellular animal kingdom, are substantially more complex.

但是我们人类和其他多细胞一样，要复杂得多。

And this isn't just the case for humans — it's true of every animal, plant, and fungus, and nearly every multicellular organism on Earth.

而且这不仅仅是人类的情况——每种、植和真菌，以及几乎所有地球上每个多细胞的生体都是如此。

Before that, there was pretty much no multicellular life on land at all — animals all lived in water because, well, that's where the food was.

在此之前，陆地上几乎没有多细胞生——都生活在水里，因为食就在水里。

Multicellular organisms, then larger animals, could now evolve thanks to this new element, essential for keeping these increasingly complex biological machines running.

多亏了这个新元素，多细胞生和更大的才得以进化，这个元素维持这些日益复杂的生机器运转至关重要。