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Gerta Keller also had samples from the core.
Gerta Keller也有一些巖芯樣本。
She was looking for something quite different.
她正在觀察一些很不尋常的東西。
I just scanned them very rapidly, and at first I didn't see anything,
我大致看了一下，一開始沒有什么發(fā)現(xiàn)，
and then I began to see some shapes that looked familiar.
后來我開始觀察一些相似的結(jié)構(gòu)。
What Keller thought she had seen, were microscopic plankton fossils called forams,
Keller認(rèn)為她看到的是一種叫做有孔蟲的微小浮游生物的化石，
but they were poorly preserved and it took an expert eye to make them out.
但它們保存得很不完整，只有專家的眼光才能發(fā)現(xiàn)它們。
This is a 3D image of a perfect foraminifera.
這是完整有孔蟲的3D圖像。
This is what we found in the core, it is a cross section of the same species.
這是我們在巖芯中發(fā)現(xiàn)的，這幅橫截面上的是同一種類。
This is another 3D image, you see five chambers arranged in a circle,
這是另一幅3D圖像，你可以看到圈的周圍有5個小室，
you can see the same chambers in the cross section.
這幅橫截面上有很多這樣的小室。
Here is another species, each of the segments come to a pinched end, and the same you can see on the cross section.
這是另一種，每一部分都有收縮末端，它們同樣遍布整個橫截面。
All these species went extinct at the same time as the dinosaurs,
所有這些物種都與恐龍同時滅絕，
yet Keller had found their fossils in rock, formed after the Chicxulub impact.
可是Keller在巖層中發(fā)現(xiàn)的這些化石卻是在希克蘇魯伯大碰撞后形成的。
For Keller the meaning of the discovery was clear.
對于Keller來說，這一發(fā)現(xiàn)的結(jié)論不言而喻。
