Microfossils found in rocks deposited during Earth's largest mass extinction
may be the spores of very hardy fungi, a new study hints.
The hidden 121 kilometer (75 mile)-wide crater could solve an age-old question: What caused the biggest mass extinction
in Earth's history?
The Cretaceous ended 65 million years ago, the time of the mass extinction
that wiped out dinosaurs and most birds.
The two scientists studied the survivorship of 350 evolutionary lineages of marine mollusks--clams and other two-shelled ocean dwellers --during the mass extinction
event that killed the dinosaurs at the close of the Cretaceous Period, 65,000,000 years ago.
23 ( ANI ): Researchers have suggested that the mass extinction
at the end of the Permian period, about 250 million years ago, was triggered by contemporaneous volcanic eruptions in Siberia.
Summary: TEHRAN (FNA)- 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.
As one of the scientists who discovered that dinosaurs went extinct when an asteroid struck Earth, he contemplates the chances of a mass extinction
Lead author Sandra Rehan, an assistant professor of biological sciences at UNH, worked with colleagues Michael Schwarz at Australia's Flinders University and Remko Leys at the South Australia Museum to model a mass extinction
in bee group Xylocopinae, or carpenter bees, at the end of the Cretaceous and beginning of the Paleogene eras, known as the K-T boundary.
Washington, August 29 ( ANI ): The ancient closest relatives of mammals -cynodont therapsids - were able to survive the greatest mass extinction
252 million years ago and thrived in the aftermath, a new research has claimed.
A 10-million-year nosedive in atmospheric-oxygen concentration straddles the largest mass extinction
in the fossil record (SN: 2/1/97, p.
We even have dueling predictions of global disaster in the form of "The Sixth Extinction: Patterns of Life and the Future of Humankind," by Richard Leakey and Roger Lewin; and "The End of Evolution: A Journey in Search of Clues to the Third Mass Extinction
Facing Planet Earth," by Peter Ward.
Washington, August 14 ( ANI ): A new research has studied how anomodonts responded after Permian mass extinction
, about 252 million years ago, when as many as 90 percent of marine organisms and 70 percent of terrestrial species became extinct.