Many scientists blame fossil fuel emissions for contributing to warmer temperatures.

许家指责化石燃料排放导致气温升高。

Scientists already use fossilized shells to reveal details of the Earth's ancient climate.

家已用化石贝壳揭示了古代地球气候的细节。

Paleontologists study fossils to learn about the history of life on Earth.

古生物家研究化石以了解地球生命的历史。

Since then, many scientists who study fossils, or paleontologists, have investigated how all these creatures could have died together.

从那时起，许研究化石的家或古生物家研究了所有些生物是如何起死亡的。

Fifty years ago, most paleontologists thought that fossil footprints, which we also call trace fossils, were rare and unimportant.

50 年前，很古生物家认为化石足迹，也名叫“遗迹化石”，是罕见且无价值的。

The fossils helped scientists understand the evolution of a bone structure that helps pandas eat bamboo called a false thumb.

些化石帮助家了解了辅助大熊猫吃竹子的种骨骼结构的进化，种骨骼结构叫做伪拇指。

Both snakes lived during exceptionally warm climate periods, said Cambridge University fossil scientist, Jason Head, who was not involved in the study.

剑桥大化石家杰森·海德没有参研究，他表示，两条蛇都生活在异常温暖的气候时期。

These changes looked strikingly similar to the changes scientists see in the fossil record, as ancient species started making the transition to land.

随着古代物种开始向陆地过渡，些变化看起来家在化石记录中看到的变化惊人地相似。

With these fossils, scientists are trying to determine how small, furry land animals evolved into the dozens of species of whales we know today.

有了些化石，家们正试图确定小型、毛茸茸的陆地动物是如何进化成我们今天所知道的数十种鲸鱼的。

The dawn of speech is one of the great puzzles of evolution because there's no fossil record of verbal communication for scientists to look back through.

语言的黎明是进化史上的巨大谜题之，因为并没有记录语言交流的化石供家来回溯过去。

Using a technique called Bone Histology where scientists slice up fossils into very thin sections, we can look at the internal structures found in fossils.

使用种称为骨骼组织的技术，家将化石切成非常薄的部分，我们可以查看化石中发现的内部结构。

Thanks to well-preserved skull fossils, scientists know that it had recurved teeth for hunting, and the ear region of its skull suggests that it was adapted to hearing underwater.

由于保存完好的头骨化石，家们知道它有后弯的牙齿用于狩猎，而它头骨的耳朵区域表明它适应了水下听力。