Mass Extinction: Life at the Brink tells that story. The hour-long documentary, airing on the Smithsonian Channel, explores the causes of two of Earth's five mass extinctions: the dinosaurs' demise and the "Great Dying." That long-ago extinction, roughly 252 million years ago, saw as many...
Humans have already wiped out hundreds of species and pushed many more to the brink of extinction through wildlife trade, pollution, habitat loss and the use of toxic substances. But the findings published in the scientific journalProceedings of the National Academy of Sciences(PNAS) show that the...
“It’s a miracle,” said lead author Dawson White, a postdoctoral researcher in the Department of Organismic and Evolutionary Biology at Harvard. “Many of Centinela’s plants are still on the brink of extinction, but fortunately the reports of their demise were exaggerated. There’s still tim...
The greatest Phanerozoic mass extinction happened at the end-Permian to earliest Triassic. About 95% species, 82% genera, and more than half families became extinct, constituting the sole macro-mass extinction in geological history. This event not only caused the great extinction but also destroyed...
Changhsingian magnetic polarity timescale compiled from integrated stratigraphy at Shangsi.High-resolution polarity and δ13C enable global correlations of the Permian-Triassic interval.The polarity chron (LT1n) is after mass extinction and prior to the Permian-Triassic boundary.关键词: Latest Permian...
With the steep decline in populations of many animal species, from frogs and fish to tigers, some scientists have warned that Earth is on the brink of a mass extinction like those that occurred only five times before during the past 540 million years. Ea
Some of the really hard conversations around climate change in the future are going to be with communities who will need to relocate or will lose their way of life because of climate impacts. These discussions are both really important and really difficult – we should be planning for that. ...
There is at present some controversy about the reason for the mass extinction of dinosaurs and other forms of life at the end of the Cretaceous. A suggesti... J.,A.,Gledhill - 《Eos Transactions American Geophysical Union》 被引量: 8发表: 1985年 加载更多来源...
Life on Earth has a long, but also an extremely turbulent history. On more than one occasion, the majority of allspeciesbecame extinct and an already highly developed biodiversity shrank to a minimum again, changing the course of evolution each time. The most extensive mass extinction ...
On the Brink of Extinction: conserving the diversity of life Because of such pressures as acid rain and air pollution in industrial countries and the indiscriminate destruction of tropical forest throughout many of t... Wolf,C Edward - 《Washington D》 被引量: 34发表: 1987年 ...