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...
The problem with this graph is that before 500 years ago, extinction rates are approximated from studying fossils, which is a notoriously unreliable method of measuring extinction rates. As explained in the textbookBiodiversity and Environmental Philosophy, the “benchmark for assessing the severity of...
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...
"So far, only 1 to 2 percent of all species have gone extinct in the groups we can look at clearly, so by those numbers, it looks like we are not far down the road to extinction. We still have a lot of Earth's biota to save," Barnosky said. "It's very important to devote re...
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. ...
A new study in PNAS highlights the mass extinction we are currently undergoing and how losing species would devastate entire ecosystems and upend human life as well. The researchers emphasize the need for immediate action that includes designating any species with populations less than 5,000 as “...
earthquakes would have triggered the volcanism in the Siberian traps, leading to the release of large amounts of CO2 and sulfur dioxide. These gases combined with methane previously released would have created a noxious atmosphere, combined with climate change that killed a large scale of life. ...
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 The Survival of...
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...
Ecosystem remodelling among vertebrates at the Permian-Triassic boundary in Russia The mass extinction at the Permian-Triassic boundary, 251 million years (Myr) ago, is accepted as the most profound loss of life on record. Global data com... MJ Benton,VP Tverdokhlebov,MV Surkov - 《Nature...