Tag: "extinct" at biology news

Society for Vertebrate Paleontology to hold annual meeting in Montana in October

...ns on more than just dinosaurs. They'll hear about extinct sharks, sea turtles, rodents, sabertooth cats, bears, dolphins, woolly mammoths, horses, elephant birds, armadillos and lizards. "It used to be you could stick all the dinosaur paleontologists and technicians in one room," Leiggi said. "Now I don't ...

Surprising link between body size and extinction risk

Most of the Australian mammals that have gone extinct in the last 200 years were medium sized, and many ...UK. Nearly half of all the mammals that have gone extinct worldwide in the last 200 years were Australian, and most of them were medium-sized (1.2 ounces - 12...

Hopkins scientist evaluates latest findings on the ancestry of whales

...eared to be the sister group of mesonychians -- an extinct group of land-dwelling carnivores. The new fossils...animals to help interpret the probable behavior of extinct mammals. He was invited by the editors of Science to write the perspective on the new fossil discov...

Rafting rodents from Africa may have been ancestors of South American species

...animal evolution, it cannot provide information on extinct animals. "The problem is that we cannot sequence genes on some of the fossils, because they are too old," Honeycutt says. "The big questions are: 'How many fossils have anything to do with a direct ancestry of the lineages we see living today? And ho...

Blame North America megafauna extinction on climate change, not human ancestors

...that since some genera can be shown to have become extinct around 11,000 years ago, all the big North American mammals became extinct at that time, he said. "That's an enormous assumption, even though there is no compelling evid...

Researchers find closest living relative of first land plants

...n 400 millionyears, their common ancestor has been extinct for even longer andhasn't been identified in the fossil record. Our data confirm that land plants and the Charales bothevolved from a common ancestor that was a fairly complexorganism, said Delwiche. We now can make specific inferencesabout wha...

Scientific bias helping cause mass extinction

...ian ecologist. Scientists develop and use lists of extinct and threatened species to provide social and legal...n the various lists themselves. Lists of presumed extinct and threatened species are characterised by a substantial degree of turnover. A species extinct tod...

The oceans top 10 coral reef hotspots identified for first time

...tention that marine species are unlikely to become extinct as a consequence of human activities because of their vast geographic ranges in the oceans. CABS conducted the study in order to identify priority areas for coral reef conservation. We know that unless we take action right away, marine species will s...

2.6 billion years of primate and carnivore evolutionary history at risk

...ne of these species in a biodiversity hotspot goes extinct we not only lose that particular animal, but we also lose its contribution to the evolution and ultimately the survival of that species as a whole. said John L. Gittleman, University of Virginia evolutionary biologist and co-author. You only see the...

UNC geologist, students to unveil 221 million-year-old top N.C. fossil

...nstakingly piece together the large skeleton of an extinct reptile known as a rauisuchian, which once roamed ...osaurs then got bigger, dominated mammals and went extinct themselves about 65 million years ago. Because it has not been published, Carter cannot disclose th...

Tyrannosaurus rex probably could not run fast, scientists say

... they couldn't observe directly. "We're looking at extinct animals, which we know very little about, and we'r...rs could do the same. Models of the extant and the extinct Garcia and Hutchinson created a computer program to analyze animal motion. Their model has a firm fo...

UAF biologist tracking extinct bears published in Science

...nd the Yukon up to 35,000 years ago, but then went extinct and show up again at 21,000 years. However, the da...brown bear diets and compared them to those of the extinct short-faced bear, which peak between 35-21,000 years ago. They also examined whether competition bet...

April GEOLOGY and GSA TODAY media highlights

...y? Thimble-sized, spring-shaped, 400 Ma fossils of extinct ocean-going animals called spiraliform graptolites provide a clue. Preserved in marine mudrocks, these three-dimensional animals are typically flattened onto a single plane. It is as if they had been wrapped in clingfilm (plastic wrap) prior to buria...

Greatest threat to Asia's wildlife is hunting, scientists say

... a dozen large mammals and birds have gone locally extinct since the end of the Indochina War, a group of experts from the Wildlife Conservation Society (WCS) have declared uncontrolled hunting and trade the greatest threat to wildlife and wild lands in Asia. The group, which held a workshop in Thailand's K...

Scientists push back primate origins from 65 million to 85 million years ago

...t we have fossil evidence for only about 5% of all extinct primates, so it's as if paleontologists have been ...iven group. It also estimates the likely number of extinct fossil species in that group. It is based on an assumed species lifetime of 2.5 million years, the n...

UMass anthropologist investigates dental development and body size in primates

...t finds a number of species of living and recently extinct lemurs living on Madagascar share very accelerated...f Stony Brook University, examined the teeth of an extinct species of large chimpanzee-sized sloth lemurs, Palaeopropithecus, and found that like some existing...

Study suggests global extinction crisis more serious than previously thought

...n of their populations are unlikely to go globally extinct and enter the species extinction statistics in the foreseeable future. The authors noted that, although the disappearance of populations is a prelude to species extinction and signals a deterioration of ecosystem services essential to society no ge...

Researchers discover clues to whale evolution

... pigs, hippos, camels, deer, and sheep) than to an extinct group of meat-eating mammals....

Extreme climate variance sped extinction of local butterfly populations, researchers say

...ations. The last two Jasper Ridge populations went extinct in 1991 and 1998. Examining 70 years of rainfall a...at checkerspot populations in the south were going extinct faster than populations in the north. It appears that their range is contracting as climate change a...

Ecological risks of GMOs come in unexpected ways, model shows

...ter life expectancy, could drive a wild population extinct in as few as 40 generations. Muir and Howard label...edicted result is that the wild population will be extinct in just 20 generations. "We consider this an extreme risk," Howard said. "That's the most severe tim...

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