搜索结果: 1-2 共查到“知识要闻 理学 decline”相关记录2条 . 查询时间(0.043 秒)
Decline in CO2 cooled Earth’s climate over 30 million years ago
earth's climate CO2 greenhouse
2021/8/5
New research demonstrates that a decline in the concentration of atmospheric CO2 played a major role in driving Earth's climate from a warm greenhouse into a cold icehouse world around 34 million year...
Global climate dynamics drove the decline of mastodonts and elephants, new study suggests
extreme global environmental change the decline of mastodonts and elephants evolution
2021/8/4
Elephants and their forebears were pushed into wipeout by waves of extreme global environmental change, rather than overhunting by early humans, according to new research.