And that means climate change could end up driving nearly 20 percent of existing lizard species extinct by 2080.

研究发现，在2080年前20%左右的蜥蜴品种可能会因为气候变化而消失。

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Cases in which many species become extinct within a geologically short interval of time are called mass extinctions.

许多物种在地质上很短的时间间隔内灭绝的情况称为大灭绝。

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Boundary clay layers are used by scientists to determine the rate at which an extinct species declined.

边界粘土层被科学家用来确定一个灭绝物种衰落的速度。

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Until two years ago, the Red List of Threatened Species of the World Conservation Union said Przewalski's horses were extinct in the wild.

VOA: special.2010.06.22

"A citizen scientist outside Peoria actually sent in a photograph of a species of bumblebee, the rusty patched bumblebee,bombus affinis, that was thought to have gone extinct in that area, and was recovered by a private citizen with a digital camera."

VOA: special.2011.05.24

"Amazingly, we've managed to get through the 20th Century without any primate species going extinct, " Dr Mittermeier said.

BBC: NEWS | Science/Nature | Quarter of primates face abyss

We need to get the infrastructure in place before more illegal logging and poaching takes place, and more species become extinct.

FORBES: How the Life of a Chipmunk in Michigan Came to Save Elephants and a Million Acres in Cambodia

Uncontrolled hunting led to this species becoming Extinct in the Wild, with the last remaining wild individual believed to have been shot in Oman in 1972.

FORBES: Conservation International: Stemming the Tide of Environmental Crises, Part Four