Modern cross-laminated timber panels perform better in fire tests than steel ones do.

现代交叉叠木板在防火测试中比钢板性能更好。

This is a piece of a living stromatolite, that I've just chopped.

这是一块活叠，我刚刚把它切碎。

These limestone-like carbonates are known on Earth to preserve stromatolites, mounds formed by bacterial growth.

这些类似灰碳酸盐在地球上以存叠而闻名，叠是由细菌生长形成土丘。

And their fossils are often preserved as layered rock structures, called stromatolites.

它们通常存为结构，称为叠。

The wavy shapes and textures of certain layers looked similar to other stromatolites.

某些波浪形和纹理看起来与其他叠相似。

Now, what probably looks like a bunch of wrinkly old rocks are actually stromatolites.

现在，可能看起来像一堆皱巴巴古老实际上是叠。

The fossils are called stromatolites, and they’re made up of layers of sediment formed by growing mats of bacteria.

这些被称为叠，它们由生长细菌垫形成沉积物组成。

In 2016, researchers found signs of some really old fossils called stromatolites, which are sediment layers made by bacterial mats.

2016 年，研究人员发现了一些名为叠古老迹象，这些是由细菌垫形成沉积。

The kids were playing and I was getting some things laminated -- because teachers are forever laminating stuff -- in the teacher's room next door.

孩子们在玩，我正在隔壁老师房间里叠一些东西——因为老师们总是在叠东西。

And billions of years ago, these stromatolites, ancient communities of photosynthetic bacteria that are equal parts biology and geology, may have exhaled the first breaths of life-giving oxygen.

数十亿年前这些叠，古老光合细菌群落，它们在生物学和地质学中是一样部分，可能已经呼出了第一口提供生命氧气。

The shape and texture of certain layers in the rocks, plus their chemical composition, are clues that there are stromatolites made by microbes inside the rocks.

中某些形和质地，加上它们学成分， 是内部存在由微生物形成叠线索。

These calcareous structures — the result of what was a brand-new process, using solar radiation as a source of energy — are stromatolites, constructed by complex microbial communities, in particular cyanobacteria.

这些钙质结构是叠，由复杂微生物群落构成，特别是蓝藻细菌。这是一个全新过程，利用太阳辐射作为能量来源。

Layers of sediment can also just build up over time, but the shape and chemical signatures in a stromatolite can reveal if it was formed by microbes.

随着时间推移， 沉积物也会不断堆积，但叠形和学特征可以揭示它是否是由微生物形成。

In a paper published this week, Australian researchers found signs of stromatolites in 3.7 billion year old rocks in Greenland – some of the oldest rocks anywhere on Earth.

在本周发表一篇论文中，澳大利亚研究人员在格陵兰岛 37 亿年前中发现了叠迹象， 这些是地球上任何地方最古老之一。