原文与直译THE SIXTH EXTINCTION第六次大灭绝Extinctions, where entire species are wiped out, are not unusual in our Earth's history.物种灭绝,即某个物种的完全消失,在地球的历史上并不罕见。In fact, over 90 percent of all species that ever li
【题目】Great whites and whale sharks are among the species at risk of extinction over the next century, a new st udy has found.Pimiento is the lead author of a study published in Science Adlvances that looks at how the extinction of large morine(海洋的) species would impoct the ...
Extinctions, where entire species are wiped out, are not unusual in our Earth’s history. In fact, over 90 percent of all species that ever lived are now extinct. In the last 500 million years, there have been five...
DEVONIAN extinctionsMARINE organismsMASS extinctionsMAGMATISMVOLCANISMDuring the Late Devonian extinction, 70鈥 82% of all marine species disappeared. The main causes of this mass extinction include tectonic activity, climate and sea-level fluctuations, volcanism, and the collision of the Earth with ...
Palaeontologists characterize mass extinctions as times when the Earth loses more than three-quarters of its species in a geologically short interval, as has happened only five times in the past 540 million years or so. Biologists now suggest that a sixth mass extinction may be under way, gi...
根据2段的“David Frost holds that preventing climate change is no longer an option, given the extent to which the Earth now appears certain to heat up.(大卫·弗罗斯特(David Frost)认为,考虑到地球现在似乎肯定会变暖的程度,阻止气候变化不再是一种选择。) ”可以判断Frost是支持适应气候变化的,根据第...
The team was looking to move beyond traditional species extinctions, to find out more about the functional diversity, the range of roles that these species perform, and how biodiversity might respond under different extinction...
Why did scientists want more information about the dinosaur extinctions at the end of the Cretaceous? Paragraph 5 implies that a special explanation of the Ir in the boundary clay is needed because Answers:the Ir in microscopic meteorites reaching Earth during the Cretaceous period would have been...
“The Great Dying” was caused by an enormous volcanic eruption that filled the air with carbon dioxide which fed different kinds of bacteria that began emitting large amounts of methane(甲烷). The Earth warmed, and the oceans became acidic. Life today desce...
Rich scientific evidence comes from the history of life on Earth -- we just have to ask the right questions to find it. Whether it's figuring out the cause of the dodo bird's extinction or the bite force of a Tyrannosaurus rex, paleontologist Michael Benton shares some offbeat quandaries ...