Sentences with phrase «when human ancestors»

The Wikipedia timeline begins at 4000 MYA with the appearance of the ealiest life - forms and includes 10 MYA for when human ancestors speciate from the ancestors of the gorillas.

PALISADES, NEW YORK — When human ancestors began scavenging for meat regularly on the open plains of Africa about 2.5 million years ago, they apparently took more than their fair share of flesh.

Wouldn't it be neat to know when human ancestors first started making stone tools or to study past pandemics and their sources with crystal - clear clarity?

Not exact matches

Apes and humans all shared a common ancestor, who, waaaaaay back when, branched off into multiple different species.

When either our animal or our primeval ancestors were not given the responsibility for our plight the blame was shifted to the social institutions which corrupt human nature.

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.

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».

When the ancestors of modern humans migrated out of Africa, they passed through the Middle East and Turkey before heading deeper into Asia and Europe.

First, when humans» ancestors descended from the trees to sleep on the ground, individuals probably had to spend more time awake to guard against predator attacks.

This is likely the point when the ancestor of leprosy bacteria jumped to our early human ancestors and transitioned from free - living to strictly parasitic.

The other derives from reports of intergroup fighting among hunter - gatherers; our ancestors lived as hunter - gatherers from the emergence of the Homo genus until the Neolithic era, when humans began settling down to cultivate crops and breed animals, and some scattered groups still live that way.

In times when a simple cheek swab mailed off with a check can produce a human DNA report listing thousands of ancestors, a sample identification would seem a simple task.

When paleobiologist Tim White of the University of California, Berkeley, and colleagues described a new human ancestor named Ardipithecus ramidus — or «Ardi» — they challenged many evolutionary assumptions.

Palaeontologists can date when our ancestors lost the organ, as the tissue attaches to a skeletal feature called the hyoid bulla, which is absent in humans.

«As we generate more sequence, [the divergence estimates] could come together,» says Rubin, whose team also determined the point when Neandertal and human ancestors stopped interbreeding: about 370,000 years ago.

Fossils unearthed in Ethiopia offer a glimpse of the time when humans and chimps were first going their separate evolutionary ways — and may represent the earliest known human ancestor.

Anthropologists call this process cultural transmission, and there was a time when it did not exist, when humans or more likely their smaller brained ancestors did not pass on knowledge.

Finding Neandertal ancestors in the human family tree was shocking enough when researchers announced it in 2010.

The similarities between the hormones suggest that our growth mechanisms are ancient: they date back at least 700 million years, to the time when there was a common ancestor of roundworms and human beings.

The Y chromosome and the mitochondrial genome have been used to estimate when the common patrilineal and matrilineal ancestors of humans lived.

Researchers have discovered that a protein which controls anxiety in humans has the same molecular ancestor as one which causes insects to moult when they outgrow their skins.

Previous research had established the wolf as the ancestor of today's dog, but when and where humans first domesticated the animals remained unclear.

This is the famous site of Dmanisi, Georgia, which offers an unparalleled glimpse into a harsh early chapter in human evolution, when primitive members of our genus Homo struggled to survive in a new land far north of their ancestors» African home, braving winters without clothes or fire and competing with fierce carnivores for meat.

But in a global sense, humans» most disruptive technologies may have been born millennia ago, when our ancestors began to plant crops and cross the globe.

In 2011, a study suggested that deletions of large chunks of DNA played a crucial role when the human family split from the ancestors of chimpanzees.

«The view has long been held that this trait evolved during the course of human evolution, when our ancestors were facing a prolonged period of warfare, as parochialism increases group cohesion and cooperation against opposing factions.

An unknown hominin species that bred with early human ancestors when they migrated from Africa to Australasia has been identified through genome mapping of living humans.

Rewiring gene activity in humans happened, in part, when transposons inserted themselves into the genomes of human ancestors after the split from chimpanzees, he reported last year in Genome Biology and Evolution.

What we don't know is exactly when the uniquely human capacity for empathy and justice emerged in our ancestors and how cultures build on a universal moral sense.

Some have argued that a predecessor to the parasite must have infected the last common ancestor to humans and chimps, 6 million or 7 million years ago, and then co-evolved when Homo sapiens stepped onto the world stage in a process called cospeciation.

The findings push back the estimated timing of the FOXP2 gene's selective sweep (rapid spread of a gene mutation due to the survival advantage it conferred) from 200,000 to 350,000 years ago, when the common ancestor of Neandertals and humans roamed the earth.

«When you're trying to reconstruct the diet of human ancestors, you want to look at a number of things, including the habitats they lived in, the potential foods that were available, how valuable those various food items would have been in relation to their energy content and how long it takes to handle a food item.»

Human ancestors have been handy since at least 2.6 million years ago, when the earliest reliably identified stone tools appear in the fossil record at Gona, Ethiopia.

And although she was among the oldest hominids known when she was discovered, there are now putative human ancestors dating back as far as seven million years ago.

And, it turns out, some 10 million to 16 million years ago, the last common ancestor of humans and apes was laughing, too, most likely when tickled.

And then at the same time, when they were looking at the pelvis, and this caused a big stir at the meeting, so there's been this idea that Lucy's species, you know, the changes that you get in the pelvis from the last common ancestor of humans and chimps were to, sort of, make us good at upright walking; and then further changes to the pelvis that you see in the evolution of our genus which will accommodate babies with larger brains.

We discovered that the appearance of a type of more complexly shaped stone tool kit in the archaeological record marked an important cognitive shift when our ancestors started to think and act more like humans rather than apes.

Ever since scientists realized that humans evolved from a succession of primate ancestors, the public imagination has been focused on the inflection point when those ancestors switched from ape - like shuffling to walking upright as we do today.

The first stems from when humans» ancestors descended from the trees to sleep on the ground.

At a time when our earliest human ancestors had recently mastered walking upright, the heart of our Milky Way galaxy underwent a titanic eruption, driving gases and other material outward at 2 million miles per hour.

Forty - seven human teeth, discovered in a cave in China, are forcing scientists to question our understanding of when and how our ancestors left Africa to migrate across the world.

Parker implies most scientists believed that OH 5 was a human ancestor and a tool user, and did so until 1972 when Richard Leakey found modern human bones buried at a deeper level.

William Ruddiman has proposed the early anthropocene hypothesis, according to which the anthropocene era, as some people call the most recent period in the Earth's history when the activities of the human race first began to have a significant global impact on the Earth's climate and ecosystems, did not begin in the eighteenth century with the advent of the Industrial Era, but dates back to 8000 years ago, due to intense farming activities of our early agrarian ancestors.

The scientists do not know which human ancestor recovered this ability, or when.

By the end of the Pleistocene, when the last great ice age ebbed, other human ancestors were gone, humans had settled the Americas and long - range weapons like spears and arrows were common — and the average mass of mammals had fallen from nearly 100 kg (220 pounds) to less than eight.

«It's possible we'll one day find three groups of hominin fossils — those with Gc - CS before the human lineage branched off, those without Gc - CS in our direct lineage, and then more recent fossils in which trace amounts of Gc - CS began to reappear when our ancestors began eating red meat,» Varki said.

Since the venom is harmless to humans (and a majority of other animals), many researchers believe it was once a trait used by the lizard's ancestors in the past when hunting.

There will be a bold re-enactment of the moment when a mutation of the FOXP2 gene, the title of the exhibition, led to a structural change in the human larynx, allowing our ancestors to develop language.

And even, in the very unlikely case that anthropogenic warming brought about some massive climate change — that too would be a benefit as human ancestors benefited greatly 65 million years ago when a massive climate change ushered out the age of dinosaurs and allowed the rise of mammals.