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Tag: "ancient" at biology news

Caribbean frogs started with a single, ancient voyage on a raft from South America

...eculate that it may not be coincidental that these ancient and successful dispersals happened after the asteroid collision rather than earlier. "The asteroid impact generated giant waves that devastated the islands, probably eliminating any existing fauna at that time," Hedges said. The original frogs th...

Potent possibilities for parasite attack

... to both. Remarkably, L. braziliensis, the most ancient Leishmania species sequenced, contains genes that could provide a working pathway for RNAi, an emerging mechanism for gene regulation. The genome sequences show that components for this pathway are absent from the other two Leishmania species. This p...

UI anthropologist, colleagues discover remains of earliest giant panda

...ablish the animal's size. Ciochon says that the ancient panda (formally known as Ailuropoda microta, or "pygmy giant panda") was probably about three feet in length, compared to the modern giant panda, which averages in excess of five feet in length. Also, like it's modern counterpart, it lived on bamboo ...

Ancient retrovirus sheds light on modern pandemic

... modern pandemic infection through the study of an ancient virus called Pan troglodytes endogenous retrovirus, or PtERV1. "This ancient virus is a battle that humans have already won. Humans are not susceptible to it and have probably b...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...eted approach allowed the researchers to trace the ancient wolves’ genetic relationships with modern-day wolves, as well as understand their role in the ancient ecosystem. “Being able to say all of those things—having a complete picture—is really unusual,” ...

Putting feelings into words produces therapeutic effects in the brain

...e research team, combines modern neuroscience with ancient Buddhist teachings to provide the first neural evi...vidual may feel less angry or less sad. This is ancient wisdom,” Lieberman said. “Putting our feelings into words helps us heal better. If a friend is sad a...

An ancient bathtub ring of mammoth fossils

...r receded from the temporary but repeatedly formed ancient Lake Lewis. PNNL geologists are plotting the deposits to reconstruct the high-water marks of many of the floods, the last of which occurred as recently as 12,000 to 15,000 years ago. "Now is the perfect time to collect geologic and paleontologic d...

Egyptians, not Greeks were true fathers of medicine

...d proof that the origins of modern medicine lie in ancient Egypt and not with Hippocrates and the Greeks. Th... "Classical scholars have always considered the ancient Greeks, particularly Hippocrates, as being the fathers of medicine but our findings suggest that the...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

...hese deep sea hydrothermal vents could be the most ancient sites of life on Earth. Yet the vents are not only of scientific interest, since the organisms may have pharmaceutical and biotechnological applications. Mining companies first turned their attention to the oceans in the 1970s, and interest grew i...

Study of protein folds offers insight into metabolic evolution

...st ancient. "Protein architecture has preserved ancient structural designs as fossils of ancient biochemistries," the authors wrote. The team used data from two international compilations of gen...

Individuals and populations differ in gene activity levels, not just genes

...xplain evolutionary development of humans from our ancient ancestors to present day. The research may also help us understand why some people are more susceptible than others to complex genetic diseases....

In Iran, cheetahs collared for the first time

... being trained by its emperors to hunt gazelles in ancient times. Iranian biologist and director of the project in Iran, Dr Hooshang Ziaie said "These captures herald a new era of conservation in Iran. This is the first time we have successfully deployed these collars in Iran, and the data they provide wil...

Paper challenges 1491 Amazonian population theories

...rain forest locations to collect core samples from ancient lakes. He then analyzes those samples for pollen and charcoal and thus is able to conclude with a high degree of accuracy the extent of human settlement in that region. "What we do say is that when you start to look away from known settlements, yo...

Jefferson scientists find rabies-based vaccine could be effective against HIV

Rabies, a relentless, ancient scourge, may hold a key to defeating another implacable foe: HIV. Scientists at Jefferson Medical College in Philadelphia have used a drastically weakened rabies virus to ferry HIV-related proteins into animals, in essence, vaccinating them against a...

Ancient genes used to produce salt-tolerant wheat

Two recently discovered genes from an ancient wheat variety have led to a major advance in breed..., we were lucky to find the durum variety with the ancient genes straight away, otherwise we might have been looking for years." The team used their knowle...

Loss of a universal tRNA feature reported

... remarked: "The loss of a universal and apparently ancient tRNA feature in two members of the alphaproteobact... unique case of divergence from a highly conserved ancient tRNA recognition mechanism by an aminoacyl-tRNA synthetase. It will be of special interest to examin...

Fitness has fallen since the days of Ancient Greece

We may not be as fit as the people of ancient Athens, despite all that modern diet and training ...of their endurance, he realised that the rowers of ancient Athens -- around 500BC -- would had to have been highly elite athletes, even by modern day standards...

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...r bones. The mere existence of such exceedingly ancient protein defies a longstanding assumption. When an ...providing further evidence of the staying power of ancient protein. "I think what this says is that when people make new discoveries now, if they want to ge...

New mechanism for nutrient uptake discovered

...teria, fungi, plants, and animals suggests that an ancient organism, which was a precursor to all known organisms on Earth, had developed this feature because there was much more ammonia on the early Earth. The ubiquitous presence of this structure in all of the known ammonium transporters suggests that the ...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

A team of UBC researchers has re-classified an ancient line of aquatic plants previously thought to be re...wering plants that includes the water lilies. This ancient line split off the main trunk of the family tree of flowering plants soon after they began to divers...

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