Sentences with phrase «by human ancestors»

Unable to maximize our own vigor and wellness, we looked for answers in the whole foods consumed by our human ancestors.

Archaeologists working on the eastern coast of England have found a series of footprints that were made by human ancestors sometime between one million and 780,000 years ago.

Marks on a 2.5 - million - year - old ungulate may be the work of crocodiles, rather than butchery by human ancestors.

Every year Tryon teaches archaeology undergrads basic toolmaking; the students struggle to produce forms perfected long ago by human ancestors.

I can't even imagine how one would do that, especially by human ancestors - eat mutagenic material?

Not exact matches

No, Darwin's evolution by natural selection was most certainly not based upon merely seeing some bacteria change in a petri dish, and leaping directly to humans and apes having common ancestors.

The blood - and - guts tales told by the ancestors of today's journalists gradually evolved into more civilized literary forms, to provide more complex characterizations, to describe more universal human experiences, to explore more sophisticated levels of conflict.

And if they eschewed the economic benefits of reserved places in government service by refusing to claim any relationship with their ancestors castes, this was as much a testimony to their sense of dignity as human beings as it was a witness to their Christian faith.

I read an article once that said when a human gets stressed, her hypothalamus sends a message to her adrenal glands and triggers the same response her very distant ancestors would have experienced upon getting chased by a tiger.

Though «human evolution» is a theory, considering the fossils and evidence of proto - human beings, it is far more likely that we evolved from a lesser developed ancestor than it is that we were made out of dirt by a supernatural deity.

Origins of such a notion go far back in human history, to primitive days when our remote ancestors thought that some special anima indwelt human bodies; it was given additional support by the teaching of certain of the Greeks, with their insistence on the soul as entirely distinct from, yet temporarily the tenant of, the body — at its most extreme this expressed itself in the saying soma sema, «the body is the prison - house of the soul».

Here one finds the dull report of the census - taker, the uninspired but minute directions for the performance of the cult, stories of man's beginnings and that of many of the common experiences of his life, such as language, relationship of races, why the rainbow; colorful stories, of the might and prowess of ancient ancestors of the race, riddles, puns, fables, prayers, songs that have become almost the universal songs of the human race, the history of the rise and fall of dynasties, the preaching of reformers and prophets, the questioning of it all by men grown weary of the struggle, proverbial sayings of great wisdom; the dreams of conquest both of earth and heaven.

Studies of paleolithic humans by anthropologist have indeed revealed that our ancestors had healthier bone structures with little to no evidence of bone loss or decay and very little joint -LSB-...]

According to Wall - Scheffler's research on the energetics of load carrying, the latter is the most likely option taken not just by humans but by our first bipedal ancestors.

The most parsimonious explanation is that these alleles represent the ancestral human condition, inherited by both Neandertals and modern humans in Africa from their common ancestor, Capra says.

The genetic data recovered by the research team, led by scientists from the Max Planck Institute for the Science of Human History and the University of Tübingen, provides a timeline for a proposed hominin migration out of Africa that occurred after the ancestors of Neanderthals arrived in Europe by a lineage more closely related to modern humans.

To test this hypothesis, an international team led by evolutionary biologist Philipp Khaitovich of the Shanghai Institutes for Biological Sciences in China and the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, set out to see how many brain - related genes implicated in schizophrenia underwent positive natural selection since humans and chimpanzees diverged from a common ancestor between 5 million and 7 million years ago.

Ichnologists study tracks and traces and other signs of living creatures, including the footprints left by our human and pre-human ancestors.

If true, the results suggest that human sleep patterns evolved by around 300 million years ago in a common ancestor of birds, mammals and reptiles.

And it's too early for H. heidelbergensis, which arose in Africa and Europe about 650,000 years ago and is thought by many researchers to be the common ancestor of humans and Neandertals.

A study led by physical geographer at Southampton Professor Tony Brown, in collaboration with archaeologist Dr Laura Basell at Queen's University Belfast, has found that sites popular with our early human ancestors, were abundant in foods containing nutrients vital for a balanced diet.

New evidence even raises the possibility that our modern human ancestors may have journeyed by raft or simple boat out of Africa 60,000 to 70,000 years ago, crossing the mouth of the Red Sea.

By sequencing ancient DNA from the fossils of human ancestors, researchers have recently discovered new types of ancient humans and revealed interbreeding between our ancestors and our archaic cousins, including Neandertals.

Previously he separated himself from Biblical literalists by accepting the antiquity of life and the Darwinian principles of common descent, and here he points out that certain shared features in the DNA sequences of chimps and humans show beyond any doubt that we and chimps share a common ancestor.

The quintessential Stone Age hunting spear — with a stone tip — was used by an ancestor of humans and Neanderthals

A look at sperm plugs used by chimps may help establish how the last common ancestor of chimps and humans mated

By looking for areas with distinctively rapid mutation, his team hoped to pinpoint a human genetic signature — stretches of DNA where change has been selected for over the 6 million or 7 million years since the two species shared a common ancestor.

By turns wry and giddy, Cormier teases out our uniquely human take on hedonism with tidbits as varied as the power of our orgasms (hint: no other creature on Earth can best us) and what the discovery of a 40,000 - year - old wooden flute reveals about music and our ancestors.

Human ancestors in Africa jettisoned 15.8 million of those DNA base pairs — information - carrying building blocks of DNA often referred to by the letters A, T, G and C — before dispersing around the globe, the researchers discovered.

So far, the exact mechanism by which splicing occurs was unknown, but a new SISSA / CNR - IOM study carried out with the collaboration of the Swiss EPFL has reconstructed in detail — by using computer simulations — the cleavage process for group II introns, considered the ancestors of the spliceosome, thereby shedding light on the much more complex splicing mechanism in humans.

«If these [new] dates are correct, they must be from a human population that was largely replaced by the people who are the primary ancestors of today's Australians and New Guineans,» he says.

The tools, whose makers may or may not have been some sort of human ancestor, push the known date of such tools back by 700,000 years; they also may challenge the notion that our own most direct ancestors were the first to bang two rocks together to create a new technology.

Rather than inheriting big brains from a common ancestor, Neandertals and modern humans each developed that trait on their own, perhaps favored by changes in climate, environment, or tool use experienced separately by the two species «more than half a million years of separate evolution,» writes Jean - Jacques Hublin, a paleoanthropologist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, in a commentary in Science.

By tracing the lineages of Y chromosomes back through the stone age, researchers have estimated how long ago humans» oldest paternal ancestor lived.

Details of an organism's embryonic development often reveal traits carried by its evolutionary ancestors; consider, for instance, how human embryos initially develop gill - like slits and a tail.

By tracing the spread of different strains of H. pylori, researchers have been able to trace and date the migration of modern human ancestors out of Africa.

In a new study, a research team led by Yale University found that even the oldest known human ancestors may have had precision grip capabilities comparable to modern humans.

Based on their research from the Chorora, Kadabba and Ardi finds, the team says the common ancestor of chimps and humans lived earlier than had been evidenced by genetic and molecular studies, which placed the split about 5 million years ago.

It's no surprise then that a study published 2 years ago created quite a stir by claiming that modern humans harbor a genetic signature suggesting our ancestors engaged heavily in the practice.

A human - specific gene expressed only in glial cells of the brain apparently arose from conversion of the ancestral gene by a nonfunctional pseudogene in a common human chimp ancestor.

It's also clear how this mild region, sheltered by mountains from the cold steppes to the north and from arid plains to the south, would have appealed to a band of human ancestors who may well have been the first to venture out of Africa nearly 2 million years ago.

These variants arose about a half - million years ago, suggesting that human ancestors before that time may have had moderately dark skin, rather than the deep black hue created today by these mutations.

Stone tools used by our oldest hominin ancestors 2.5 million years ago are believed to have sparked the evolution of human communication (Illustration by Jay Matternes)

The theory that all humans are descended from a recent African ancestor was promoted by geneticists who study living populations.The fossil record provides independent support for this model

If some eukaryotes had developed by Year 1.9 billion, these would have been ancestors of modern, integrated multi-cellular lifeforms from seaweeds and worms to trees and humans (as discussed below).

Armed with a clear timeline, the archeologist Marean was able to show that those human ancestors living at Pinnacle Point and Vleesbaai — located about five miles apart — showed remarkable improvement in their life style during the volcanic winter caused by the Toba eruption.

The fact is that one school of thought («Regional Continuity») believes that all Middle Pleistocene Homo were really a genetic continuum, ancestral as a whole to modern humans; another («Replacement») believes that only the African ones were our ancestors, and the others more or less died out, replaced by the newcomers from Africa.

By studying the hand bones of the Australopithecus africanus, researchers found that these ape - like human ancestors had human - like hands capable of using stone tools.

Zinjanthropus: it was indeed displaced by Homo habilis within a few years of its discovery, but even before then it had never been considered to be a human ancestor by anyone but Louis Leakey.

For much of human history, our ancestors were hunter - gatherers, mostly nomadic people who lived by hunting, fishing and harvesting wild food.