Tag: "prehistoric" at biology news

UCSF study of ancient fly gene offers insights into male fertility

...dual. The exploration has offered a glimpse into a prehistoric class of genes known as DAZ, which were discovered by Reijo Pera several years ago and have been found to have family members required for female and male fertility in diverse organisms. BOULE is a member of this family. While boule is required for m...

Overlapping genetic and archaeological evidence suggests neolithic migration

...rength of this link adds credence to theories that prehistoric people migrated from the Middle East to Europe, taking both their ideas and their way of life with them. "The recovery of history is really a jigsaw puzzle," said Peter Underhill, PhD, senior research scientist in the department of genetics an...

Finding sheds new light into mysterious process of cell movement during development

...oping egg forms a pattern shaped like one of these prehistoric marine creatures.) During an early stage of development called gastrulation, the cells begin converging from all sides of the spherical egg to the embryonic axis where the body begins to form. What begins as a disordered, chaotic motion changes into ...

DNA shows genetic variability of the nene lost more than 500 years ago, not during the 20th century

...lief that Hawaii was a pristine paradise, and that prehistoric man lived in perfect harmony with nature," said Helen James, museum specialist in the Natural History Museum's Division of Birds. James pointed out also that museum collections are vitally important to even the most cutting edge contemporary rese...

Scientists discover that genetic changes result mostly from many small contributors

...ding animals and plants for desirable traits since prehistoric times. But there has been no easy way of telling which genes have been favored by the selective breeding. Until now. By making use of the new technique of DNA microarrays ("chips"), a team of scientists lead by Ralph J. Greenspan at The Neuroscienc...

Mitokor publishes human mitochondrial genome sequencing study - American Journal of Human Genetics

...improving our understanding of human evolution and prehistoric migratory patterns. In addition, mitochondrial sequence variation has been implicated as a causative or contributing factor in a number of human diseases, commented Neil Howell, Ph.D Vice President of Research at MitoKor and the senior author of the...

Scientist probes fossil oddity: Giant redwoods near North Pole

...obably received equatorial water and warmth from a prehistoric weather pattern unlike anything in existence today. Other challenging mysteries remain, including how a forest could develop given the sunlight it would receive on Axel Heilberg. Because of its closeness to the North Pole both now and in the time of ...

Sturgeon researcher's vision spawns thriving industry

...years ago, predating most other modern fish. These prehistoric holdovers have a skeleton made mostly of cartilage with few bones and may live for over 100 years. They grow to weigh more than 1,000 pounds. They mature slowly, with wild females first spawning when 15 to 25 years old. Doroshov showed that sturgeon ...

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

...rock in 1995, Brewer impaled the ankle bone of the prehistoric creature lying just below the surface of an ancient lake or river bed. Brian brought the bone to me and asked if it was anything interesting, Carter said. I was very curious because Id never seen anything from the Triassic of North Carolina with ank...

Remains of seven types of edible nuts and nutcrackers found at 780,000-year-old archaeological site

...rategies to survive and live in the Hula Valley in prehistoric times. Research on chimpanzees and on contemporary hunter-gather tribes show that nut-gathering was performed mainly by women and children. It can be concluded that the people living on the Lake Hula shore 780,000 years ago already had developed a co...

New theory of the evolution of bird flight linked to parental care

...r flight. He points out that flight provided these prehistoric ancestors of birds with numerous advantages including the ability to safely place their young high in trees and cliffs, maximize their food sources through seasonal migration, and supply more and higher quality food by expanding their foraging range....

Genetic marker tells squash domestication story

...unambiguously identify the geographic region where prehistoric gardeners first planted the wild ancestors in their gardens, a "promising breakthrough" according to Kenneth Olsen, plant population geneticist at North Carolina State University, who has studied the origins of manioc by sequencing nuclear genes. Th...

Researchers find closest living relative of first land plants

...lion years ago, the first land plants emerged from prehistoric waters, put down roots in soil and ended up ruling the plant world. But scientists havent been certainabout the family history of those pioneer plants. By studying gene sequences of common fresh water algae, a team of University of Maryland rese...

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

...ting. "No one has ever securely documented the prehistoric extinction of any vertebrate as a result human predation, though it may certainly have happened. In virtually all cases, when people colonize an area many other changes follow - fire, erosion and the introduction of a wide range of predators and com...

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

...oup of scientists that studies dinosaurs and other prehistoric creatures will meet in Bozeman, Mont., Oct. 3-6 to talk about the latest discoveries. A record 1,200 members of the Society for Vertebrate Paleontology are expected to attend the conference at Montana State University. This is the first time the soc...

The true encroacher, human or alligator?

...nge," Scott said. "They perhaps tie us more to our prehistoric past than any other living animal." Alligators can have a tremendous economic impact, Scott said. In Louisiana and Florida, for example, crocodilians bring financial benefits not only in tourism, but also in the leather and meat markets. "Some stau...

July media highlights: GEOLOGY and GSA TODAY

...Jersey, provides a 700-year record of historic and prehistoric intense storms striking the New Jersey coast. Inte..., USA; et al. Pages 603-606This article identifies prehistoric changes in the frequency of El Nio from the distribution of mollusk shells in archaeological sites. ...

Wildlife officials to consider ban on caviar exports from major Caspian Sea nations

...WCS), founded the Caviar Emptor program. "If this prehistoric fish is to survive, the international trade in beluga caviar must be stopped. A trade ban would help reduce the pressure on this species and provide fishing nations with the time to implement important conservation measures." The global caviar m...

Monogamy appears to be unnatural in the natural world

...id. While there is no historic record showing how prehistoric humans behaved - at least, not when it comes to their sex lives - Barash and Lipton point to numerous 20th Century anthropological and sociological studies of hunter-gatherer societies where monogamy is the overwhelming exception, not the rule. In t...

University of Washington professor's new book seeks to rewrite understanding of cell biology

... also simplifies the scenario of life arising on a prehistoric earth. Scientists generally agree that the first cells began as gel-like blobs, distinct from the water around them. But how did membranes come into being, with all their complex equipment required to interact with the outside world? Thats not an ...

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