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

许多学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.

学家已用化石贝壳揭示了古代地球气候的细节。

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

从那时起，许多研究化石的学家或古生物学家研究了所有这些生物是如何一起死亡的。

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

50 多年前，很多古生物学家认为化石足迹，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.

这些化石帮助学家了解了辅助大熊猫吃竹子的一种骨的进化，这种骨叫做伪拇指。

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，这些变化看起来与学家在化石记录中看到的变化惊人地相似。

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一，因为并没有记录语言交流的化石供学家来回溯过去。

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.

使用一种称为骨组织学的技术，学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。

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，学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。