Tag: "extinct" at biology news

Arid Australian interior linked to landscape burning by ancient humans

... findings that dozens of giant animal species went extinct in Australia roughly 50,000 years ago due to ecosy...lia's megafauna weighing more than 100 pounds went extinct roughly 50,000 years ago, including an ostrich-sized bird, 19 species of marsupials, a 25-foot-long ...

New DNA studies verify existence of three right whale species

...continued into the 1970s causing them to nearly go extinct in this ocean basin. All species remain classified as either endangered or vulnerable according to the World Conservation Union (IUCN)....

Seekers of what is lost

...k the language of a vanished South American tribe, extinct passenger pigeons and a fish the coelacanth that was thought to be extinct but later found alive. "Her celebrated 'May-por-' enclosed live parrots in a translucent cylinder, b...

Oldest fossil human protein ever sequenced

...e information on the genetic relationships between extinct and living species. As ancient DNA rarely survives...s a means of determining the relationships between extinct and living species, and to better understand the phylogenetic relationships....

UF researcher: Ideas about fossil horses undergo evolution in thinking

...years ago and roamed the continent before becoming extinct at the end of the last Ice Age, about 10,000 years ago, he said. Scientists once universally thought the more primitive horses, which lived from about 55 million to 20 million years ago, were primarily leaf-eating browsers, only becoming grass eater...

Wolves alleviate impact of climate change on food supply, finds new UC Berkeley study

...llowstone National Park's gray wolves, once nearly extinct there, have returned to play a critical role in easing the effects of climate change on food availability, according to a new study by researchers at the University of California, Berkeley. When winters are severe, more elk die, providing needed fo...

Multiple sightings of long-lost woodpecker reported

...can bird species suspected or known to have become extinct since 1880. The bird was uncommon but widespread across lowland forests of the southeastern United States until logging decimated the forests between 1880 and the 1940s. The last conclusive sighting of an ivory-billed woodpecker in continental North...

Re-discovered ivory billed woodpecker still faces challenge to survival

...nt in today's Science Express that a thought-to-be extinct ivory-billed woodpecker has been discovered at Cac...ion and harvesting of contiguous forests. Presumed extinct by many, there have been unconfirmed sightings in a number of southeastern states, but no confirmati...

Stegosaur plates and spikes for looks only, researchers say

...rs that survived into the late Cretaceous and went extinct with the rest of the dinosaurs 65 million years ago, had more diverse scutes and ossicles that nevertheless were plumbed in the same way as those on stegosaurs. Based on this analysis, the team argued that it was unlikely that the larger plates that ...

Dinosaur fossil bone leads to gender, age determinations

...the dinosaur's gender and a connection between the extinct giants and living birds, specifically ostriches and emus. Schweitzer believes that the unusual tissue inside the T. rex bone is actually medullary bone: a thin layer of highly vascular bone that is found in present-day female birds only during ovulat...

DOE JGI sequences DNA from extinct cave bear

WALNUT CREEK, CA--The genomic DNA sequencing of an extinct Pleistocene cave bear species--the kind of stuff o...ehicle DNA sequencing to reveal the story of other extinct species including our nearest relatives, the Neandertals. Until now, researchers have been stymied i...

Ancient DNA confirms single origin of Malagasy primates

...ave managed to extract and analyze DNA from giant, extinct lemurs, according to a Yale study published in a r...Evolutionary analysis of the DNA obtained from the extinct giants reveals that they, like the living lemurs, are descended from a single primate ancestor that ...

Prehistoric decline of freshwater mussels tied to large-scale maize cultivation

...the millennia before European settlement. Most are extinct as a result of modern land disturbances. "Our results from prehistory support the notion that increases in human activities such as land clearing have measurable effects on freshwater mussel communities," says Haag, "and that prehistoric human activ...

Ancient DNA helps clarify the origins of two extinct New World horse species

...at includes both the domestic horse and the nearly extinct Przewalskii horse of Mongolia) suggest that the stilt-legged horses once trekked across the Bering Strait, the new PLoS Biology study shows that the American and Eurasian horses' genomes are too distinct for this theory. "We found that the stilt-le...

Costly breeding programs for endangered species pay off

...e wild, the MAI populations were less likely to go extinct or to suffer population crashes than were the populations that had undergone limited inbreeding. "The benefits of maximum-avoidance inbreeding were difficult to detect as long as the populations remained captive," said Meffert. "It's not clear why th...

Ancient diets of Australian birds point to big ecosystem changes

...go -- failed to make the dietary switch and became extinct shortly after humans arrived, he said. "The oppor...ds and reptiles weighing more than 100 pounds went extinct shortly after humans arrived, including 19 species of marsupials, a 25-foot-long lizard and a Volksw...

Study in Royal Society journal on world's only horned rodent

...at Plains, has long puzzled paleontologists. This extinct mammal, related to the living sewellel, is the only known horned rodent and the smallest horned mammal. The ancestors of Ceratogaulus evolved a burrowing lifestyle, but a rigorous test of adaptation reveals that the horns in this animal were not evo...

Living fossil roams the seas

...st of South Africa in 1938, having been considered extinct for 65 million years. Because of its close resemblance to land animals, it has attracted attention to the subject of a 'missing link' between tetrapods and humans. Dr. Chris Amemiya will be presenting his work on the generation and utilization of gen...

Study: Predatory dinosaurs had bird-like pulmonary system

...n animals to learn more about the anatomy of these extinct beasts....

Microchip saves rare turtle from soup-pot

...esting females recorded each year, does not become extinct in Cambodia. "This is a clear and very positive example of how authorities can cooperate across international borders to resolve specific trans-border trade cases", says Doug Hendrie, the Asian turtle coordinator for WCS and Cleveland Metroparks Zoo....

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