西内SINE

陨石碎片到处都是，就像洞里的一样。
Meteor debris is everywhere as much as in the hole.

你们的喷气推进实验室是这么说的：
Here is what your Jet Propulsion Laboratory says:

喷气推进实验室，2003年3月6日
Jet Propulsion Laboratory, 3/6/2003

美国宇航局，检索和编辑于2008年11月12日
NASA retrieved and edited 11 12 2008

"1991年发表的对磁性和重力数据的研究，以及对岩石和海洋沉积物的分析，帮助科学界证实希克苏鲁伯就是那次撞击的发生地，那次撞击将地球上的生命引向了新的方向，从恐龙时代到了哺乳动物时代。
"Studies … of the magnetic and gravity data plus analysis of rocks and ocean sediments published in 1991 helped convince the scientific world that Chicxulub was the site of the impact that sent life on Earth in a new direction, from the age of dinosaurs to the age of mammals.

关于希克苏鲁伯的许多事情至今仍然是个谜。‘我们还不十分清楚撞击是如何导致物种大灭绝的。’科学家波普说：‘我们觉得应该是这样的，但我们还不清楚这里面的“杀死机制”。有一种理论认为，那次撞击向大气中抛撒了大量灰尘，遮住了太阳，阻碍了植物生长。另一种解释是，撞击释放出的硫导致了全球硫酸云，这些硫酸云也阻挡了太阳，并且下了酸雨。还有一种可能是，撞击产生的炽热碎片重返大气层而引发的全球野火。’
Much about Chicxulub remains mysterious. ‘We don't know exactly how the impact caused the mass extinctions,’ says scientist Pope. ‘We believe it did, but we don't know what the "kill mechanism" was. One theory is that the impact threw up so much dust into the atmosphere that it obscured the Sun and stopped plants from growing. Another is that the sulfur released by the impact lead to global sulfuric acid clouds that also blocked the Sun and fell as acid rain. Global wild fires triggered by the atmospheric reentry of red-hot debris from the impact are another possibility.’

自从2003年你们的喷气推进实验室说了这些话，其他一些人就得出结论说这次特殊的碰撞并不是在相对较短时间内发生的物种大灭绝的原因。
Since 2003 when your Jet Propulsion Laboratory said this, some others concluded this particular collision was NOT the cause of mass extinctions that occurred in a relatively short time.

还有一些引述：
Still quoting:

维基百科，检索和编辑于2008年11月12日:
Wikipedia retrieved and edited 11/12/2008:

"包括古生物学家罗伯特·巴克在内的一些人认为，这样的撞击不仅杀死了恐龙，也杀死了青蛙，然而青蛙在灭绝事件中幸存了下来。普林斯顿大学的杰尔塔·凯勒认为最近希克苏鲁伯陨石坑的岩芯样本证明那次撞击发生在大灭绝之前约30万年，因此不可能是导致大灭绝的原因。
"Some, including paleontologist Robert Bakker, argue that such an impact would have killed frogs as well as dinosaurs, yet the frogs survived the extinction event. Gerta Keller of Princeton University argues that recent core samples from Chicxulub prove the impact occurred about 300,000 years before the mass extinction, and thus could not have been the causal factor.

除了陨石坑本身，这次撞击的主要证据还包含在一层薄薄的黏土中......这些黏土遍布世界各地......其中含有异常高浓度的铱......[其来源很可能就是富含铱的陨石。] 据推测，当撞击块汽化时，铱扩散到了大气中，然后与因撞击而抛起来的其它物质一起沉淀到地表上来，产生了富含铱的粘土层。
The main evidence of such an impact, besides the crater itself, is contained in a thin layer of clay present … across the world … that contained an abnormally high concentration of iridium … [whose source could well be iridium-rich meteors.] It was hypothesised that the iridium was spread into the atmosphere when the impactor was vaporized and settled across the Earth's surface among other material thrown up by the impact, producing the layer of iridium-enriched clay.

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