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Tag: "ancestors" at biology news

New Clues Add 40,000 Years to Age of Human Species

... Since the 1980s, almost everyone agreed that our ancestors originated on the African continent, but they differed on when modern humans first evolved, how humans dispersed to populate the globe, and what happened when, or if, modern humans encountered other hominid species in Eurasia. “For several decades, ...

Same mutation aided evolution in many fish species, Stanford study finds

...st of these fish evolved independently from marine ancestors that are covered head to hind fin in body armor. Although it's not clear why losing the armor is a benefit to freshwater fish, Kingsley noted that the unarmored fish are lighter and faster than their more burdened marine cousins. In an effort to lea...

Cricket's finicky mating behavior boosts biodiversity

...ase to recognize each other as mates. Although the ancestors recognized each other as mates, the descendants no longer do because of evolutionary change. In the case of Laupala, members of the two species are physiologically capable of mating. But they appear to lose the desire to interbreed before they lose t...

Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive

...n response that developed in other animals and our ancestors inherited in order to speed up the mating process." Einstein's Brown concluded, "Our results suggest that romantic love does not use a functionally specialized brain system. It may be produced, instead, by a constellation of neural systems that conv...

The biggest family tree ever

Ever wondered where your family's ancestors roamed 60,000 years ago? Now you can find out by p...migratory history. The project will reveal how our ancestors diversified into different groups and what routes they took as they spread out over the Earth. One ...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

The ancestors of chimpanzees and gorillas were infected with a d...on years ago, but there is no evidence it infected ancestors of modern-day humans, according to research by genome scientists. The virus struck after humans had ...

Map of life on Earth could be used on Mars

...divergences onto the tree, Blank observes that the ancestors of each of the three kinds of prokaryotes inhabited one of Earth's three types of hydrothermal systems, which include sulfurous steam vents like those which smatter the Yellowstone caldera, hydrothermal deep-sea vents, and boiling silica-depositing s...

Revueltosaurus skeleton unearthed at Petrified Forest upsets dinosaur tale

...o question the identity of other presumed dinosaur ancestors known only from teeth, which includes all Late Tri...," Parker said. "Diversity is only found among the ancestors of the sauropods and theropods. Exactly how diverse were these other groups? That's something we als...

Agilent Technologies introduces high-capacity human protein removal system for proteomics research

...o question the identity of other presumed dinosaur ancestors known only from teeth, which includes all Late Tri...," Parker said. "Diversity is only found among the ancestors of the sauropods and theropods. Exactly how diverse were these other groups? That's something we als...

Study: Predatory dinosaurs had bird-like pulmonary system

...ed unique to birds was present in some form in the ancestors of birds," said Patrick O'Connor, an assistant professor of biomedical sciences at Ohio University's College of Osteopathic Medicine and lead author on the study, which was funded in part by the National Science Foundation. O'Connor and collaborator...

From a Few Wild Ancestors, a Citrus Cornucopia

...nia,?says Krueger, “so it’s possible that no early ancestors have escaped modification by humankind. But it’s worth investing in the plant exploration needed to find out.?/p> Because citrus readily crosses and the resulting plants can be propagated true-to-type through grafting, selective breeding efforts ...

The roots of civilization trace back to ... roots

...gans like roots and tubers must have sustained our ancestors who left the rain forest to colonize the savannah....e into more and more open habitats." When our ape ancestors moved -- for reasons unknown -- onto the open, relatively treeless savannah, they left behind the ra...

“Hitchhiking?Viruses as Cancer Drug Delivery System

...gans like roots and tubers must have sustained our ancestors who left the rain forest to colonize the savannah....e into more and more open habitats." When our ape ancestors moved -- for reasons unknown -- onto the open, relatively treeless savannah, they left behind the ra...

Lactose intolerance linked to ancestral environment

...sity study finds that it is primarily people whose ancestors came from places where dairy herds could be raised...digest milk. On the other hand, most adults whose ancestors lived in very hot or very cold climates that couldn't support dairy herding or in places where deadl...

Genetic link confirmed between Polynesians and indigenous Taiwanese

... aboriginal populations of Taiwan, suggested to be ancestors of today's Polynesians, and looked for unique genetic markers that occurred in the aboriginal people. They then compared these markers to those found in mainland Chinese, Taiwanese, and other Southeast Asian peoples. Trejaut et al. found that the in...

High-Throughput GoMiner

... aboriginal populations of Taiwan, suggested to be ancestors of today's Polynesians, and looked for unique genetic markers that occurred in the aboriginal people. They then compared these markers to those found in mainland Chinese, Taiwanese, and other Southeast Asian peoples. Trejaut et al. found that the in...

DNA traces evolution of extinct sabertooths and the American cheetah-like cat

...ern cats--that is, they diverged early on from the ancestors of modern cats and are not closely related to any living felid species. The phylogenetic tree drawn from the new data also shows that the American cheetah-like cat is genetically most closely related to the puma, rather than to the true African chee...

California computer scientists double volume of data in NIH biotech repository

...0 individuals from four different populations with ancestors from parts of Africa, Asia and Europe. The HapMap data is a major resource for understanding the structure of human variation and the genetic basis of human disease. All of the HapMap data is deposited in NCBI and was made available to the Californ...

U-M scientists say fused genes trigger the development of prostate cancer

...0 individuals from four different populations with ancestors from parts of Africa, Asia and Europe. The HapMap data is a major resource for understanding the structure of human variation and the genetic basis of human disease. All of the HapMap data is deposited in NCBI and was made available to the Californ...

The earliest animals had human-like genes

...olutionary comparisons to find out what the common ancestors of humans, flies and worms were like." Until quite recently, such comparisons could only be made by looking at physical characteristics such as the structure of bones, teeth, or tissues. But DNA sequencing now permits scientists to make comparisons ...

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