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Tag: "ancient" at biology news

The chimpanzee stone age

...of use as tools for smashing nuts when compared to ancient human or modern chimpanzee stone tools. Also, they found several types of starch grains on the stones; part of the residue derived from cracking local nuts. The tools are 4300 years old, which, in human terms, corresponds to the Later Stone Age (PNAS...

Hofmeyr skull supports the 'Out of Africa' theory

... from the southernmost tip of Africa and similarly ancient skulls from Europe is in agreement with the genetics-based "Out of Africa" theory, which predicts that humans like those that inhabited Eurasia in the Upper Paleolithic should be found in sub-Saharan Africa around 36,000 years ago. The skull from Sou...

Mummy's amazing American maize

...sity of Manchester researchers compared the DNA of ancient maize found in the funerary offerings of the mummy...ame region today. Surprisingly, they found both ancient and modern samples of the crop were genetically almost identical indicating that modern European inf...

Researchers find 6,000-year-old fossil evidence

...ry enables researchers to gain a better picture of ancient diets. By analyzing the grains on cooking tools, t...evidence of this diet on grinding stones from four ancient households at Real Alto, leading her to conclude that these foods were eaten by everyone, not just t...

DNA analysis reveals rapid population shift among Pleistocene cave bears

Studying DNA obtained from teeth of ancient cave bears, researchers have been able to identify...ed by Cell Press. To investigate the stability of ancient cave bear populations over time, the researchers obtained DNA samples from 29 cave bear teeth from t...

New evidence of 'human' culture among primates

...ans, and as more evidence emerges, it is hoped the ancient ancestry of human behaviour will become clear. ...

More species in the tropics because species have been there longer

...s of tropical regions seems to be explained by the ancient origin of many groups in the tropics, more recent ... most other groups, then the tropics may have more ancient lineages and more genetic diversity per species than temperate regions. So there may be far more los...

Selecting life: Scientists find new way to search for origin of life

...re now thought to have been so productive that the ancient Earth must have had far more different kinds of molecules than could have been used by early life. One of the biggest questions in origins research, therefore, is how just the right blend of critical biomolecules was selected, concentrated, and organ...

Study illuminates how the plague bacteria causes disease

...e died in the plague epidemics that devastated the ancient world, the researchers said. The successful weaponization of plague in the former Soviet Union bioweapons program also made the pathogen a primary biodefense concern. Additional medical concerns have arisen from the evolution of multidrug-resistant s...

Ancient ape ruled out of man's ancestral line

...n cave complex which has yielded a number of other ancient finds. It is thought he either fell down a shaft or somehow got trapped in the cave and died there to be covered by the sediment layers from which he is now being slowly extracted. These sediments are themselves sandwiched between stalagmite layers w...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...n Earth, finding paleontological evidence of these ancient microbes has proven elusive. At the AGU session, G. Todd Ventura of the University of Illinois-Chicago will describe what may be the earliest archaean fossil evidence yet discovered-rock samples that are 2.71 billion to 2.65 billion years old that w...

Siberian lakes burp 'time-bomb' greenhouse gas

...ted 500 gigatons of carbon, largely in the form of ancient dead plant material. "This material has been locked up in permafrost since the end of the last ice age," Walter said. "Now it is being released into the bottom of lakes, providing microbes a banquet from which they burp out methane as a byproduct of ...

Researchers discover that sheep need retroviruses for reproduction

...ogenous retroviruses can be considered remnants of ancient retroviral infections, Spencer said. Many scient...mammals," he said. "The enJSRVs arose from ancient infections of small ruminants during their evolution," said. Dr. Massimo Palmarini, a virologist at ...

Worms produce surprise insight into human fever

...ing new about fever, says Aballay. Fever is an ancient immune mechanism used by metazoans in response to microbial infections. Warm-blooded “homeotherms?like rats (and people) can increase their internal body temperature in response to infection, yet even cold-blooded “poikilotherms?like worms migrate...

Coral stress 'like never in history'

...reefs face more stress than ever. But while the ancient reefs warn that we are seeing abnormal die-off rates, they also show that the reefs of the past recovered rapidly after these events, taking as little as 100 years to be repopulated by the corals that normally occurred there. Although they are st...

Tiny bones rewrite textbooks

...th Wales, note that New Zealand separated from the ancient supercontinent of Gondwana more than 80 million years ago. The research has been published in the journal Proceedings of the National Academy of Sciences. "This amazing find suggests that other mammals are waiting to be found there, and that New Ze...

Two central mysteries in genome inheritance solved at UCSD

...indicating that its role in genome distribution is ancient and widely conserved. Identification of this protein group provides scientists with new drug targets in cancer cells. "Right now, drugs used in chemotherapy affect microtubules in all the body's cells, resulting in adverse side effects, like nerve ...

Microbe fixes nitrogen at a blistering 92 C

...ogenase from FS406-22 might have retained the most ancient characteristics, possibly derived from a nitrogenase present in the last common ancestor of modern life," the co-authors conclude in their report. ...

Researchers barcode DNA of Venice museum's vast fungi collection

...objects aren't Renaissance paintings or the art of ancient glassblowers. Instead, the team is collecting samples from the largest and best preserved collection of fungi in Italy to create an unprecedented DNA database. These 28,000 samples of fungi that represent 6,000 species - many of which are quite rare...

Researchers give name to ancient mystery creature

...ve been able to put a name and a description to an ancient mammal that still defies classification. The findings, published recently in the Journal of Paleontology provide the first and only comprehensive account of the creature, named Horolodectes sunae, for the unusual shape of the crowns of the teeth. Ho...

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