Cephalopods may have evolved complex brains long before our vertebrate relatives.

头足类或许比我们的脊椎动物近亲更早演化出复杂的脑部。

Other kinds of head hair evolved as humans moved to different places.

人类移居不同的方时，也演化出不同类型的头。

Some early egg-laying species gradually led to the creation of the proto-chicken which laid proto-chicken eggs.

某些早期的卵生物种逐渐演化出原型鸡，而原型鸡产下原型。

Isolated communities may evolve from millions of years in relative peace.

与世隔绝的动物群落可能在数百万年内演化出了相对稳定的生态。

Although sun bears mostly live alone, scientists recently discovered they have developed a surprising social skill.

尽管马来熊大多数时间都独自生活，但是科学家最近现，它们演化出了一种惊人的社交技巧。

They have independently evolved the same trick.

他们独立演化出了同样的把戏。

Did bats evolve flight or echolocation first, or did it evolve in tandem?

蝙蝠是先进化出飞行还是回声定位，还是同时进化？

What tragic dignity, for example, can be wrought into a scene like this!

像这样的场面，能演化出何等悲壮的尊严！

They're some of the most bizarre things who've ever evolved on Earth.

它们堪称上演化出的 最奇特的生物之一。

We have evolved a redundancy in our speech specifically that allows us to hear speech in the presence of natural sound.

我们在言语中演化出了一种冗余性，让我们在有大自然声音的情况下还能听到言语。

Well, the secret of the Sundarbans, lies in beautiful relationships that have evolved between the most unlikely species — including the tiger.

松达班的秘密就在于，在两个最不可能的物种之间——其中之一是老虎，已经演化出了美妙的联系。

Now, but wait. If animals and humans evolved to prevent susceptibility to toxoplasma, why did DD get it?

等等，回过头来，如果动物和人会演化出抵抗弓形虫的能力，那为什麽DD会病呢？

And you see mammals evolved a lot of characteristics related to being able to move around at night.

你会看到哺乳动物演化出了许多能够在夜间活动的相关特征。

So insects evolved to be water repellent. For one their exoskeleton is covered with a thin layer of wax just like a car.

所以昆虫演化出防水功能，其中之一是它们的外骨骼包覆着一层薄薄的蜡，就像车子。

Across mammalian species, hairs have been modified for numerous purposes, ranging from the soft fluff covering rabbits to the rigid quills protecting porcupines.

哺乳动物中，毛已演化出多种用途，从覆盖兔子的柔软绒毛到保护豪猪的硬刺。

The tree has evolved to produce these hollow thorns, and they are the perfect structures for the ants to make their colonies inside.

这种树已经演化出了中空的荆棘，对于蚂蚁来说，这是把它们用来当做自己领的完美结构。

In order to protect their eggs from predators and to keep their eggs warm, dinosaurs evolved a list of strategies.

为了保护自己的免受掠食者的侵害并保持的温度，恐龙演化出一系列策略。

While oxygen molecules have been around as long as Earth's oceans, oxygen gas didn't appear until ocean-dwelling microorganisms evolved to produce it.

虽然有海洋的时候就有氧分子了，但要到海洋中的微生物演化出生产氧气的能力之后才有氧气出现。

So by the late 1800s, many scientists believed that it was this group, the ornithurines, that gave rise to today's birds.

因此，到 1800 年代后期，许多科学家认为正是这一类鸟纲动物演化出了今天的鸟类。

Like a family tree, with the most primitive ancestral forms at the trunk, evolving into more derived species on the branches.

就像一棵家谱，在树干上有最原始的祖先形态，在树枝上演化出更多的派生物种。