单词：grassland climate
单词：grassland climate 相关文章
Cooling, Drying Climate May Have Led to Neanderthal Disappearance A new study suggests that ancient periods of cold and dry climate helped our species take the place of Neanderthals in Europe. Researchers found that such cold periods happened at the
2018年VOA慢速英语(九)月
The United Nations Climate Summit takes place next week in Poland. About 20,000 people from 190 countries are expected to take part in the conference. There, world leaders will debate how to limit climate change -- the weather events linked to slowly
2018年VOA慢速英语(十一)月
The fact that both horses and mammoths were here suggests these forests werent. It seems that, 14,000 years ago, Beringia was a huge expanse of open grassland. This unique habitat of cold, dry grasslands is known as mammoths steppe. But thats not how
探索与发现2012年
But there is a problem with the idea that hunting caused the mass extinction. Mammoths were not the only animals to disappear. Camels survived for millions of years in North America, but disappeared around the same time as the mammoths. Wild horses f
探索与发现2013年
By Phil Mercer Goulburn, Australia 05 July 2007 A long drought and recent floods have intensified debate in Australia over climate change. Many Australians believe man's reliance on fossil fuels is warming the earth, while skeptics say it is all part
2007年VOA标准英语（七月）