Did eating fat in bones give us our big brains?
Long before human ancestors began hunting large animals for meat, a fatty diet provided them with the nutrition to develop bigger brains.
It's suggested that our early ancestors acquired a taste for fat by eating marrow scavenged from remains of large animals that other predators killed and ate.
The argument challenges the widely held view among anthropologists that eating meat was acritical factor in setting the stage for the evolution of humans.
That is all technology originated---Thar is the origin of IPhone right here.
Our ancestors likely began acquiring a taste for fat 4 million years a go, which explain why we crave it today.
The reservoirs of the fat in the long bones of car causes were a huge calorie_poor landscape. That could have been what gave an ancestral population the advantage it needed to set off the chain of human evolution.
While focusing On fat over meat may seem likely a subtle distinction, the difference is significant. The nutrient of meat and fat are different, as are technologies requires to require access them,meat eating is traditionally paired with the manufacture of Sharp, flaked_Stone tools,while obtaining fat_rich marrow only required smashing bones with a rock.
Reviewed evidence that a craving for marrow could fueled not just a growing brain size but the guest to go beyond smashing bones with rocks to make more sophisticated tools and to hint large animals.
That is all technology originated_Taking one thing and using it to alter something else.
HUNGRY BRAINS
The human brain consumes 20 percent of the body's energy at rest, or twice that the brains of other primates, which are almost exclusively vegetarian. It is a mystery to scientists how our human ancestors met the calorie demands to develop and sustain our large brains.
A meat centered paradigm for human evolution hypothesizes that an "ape" population began more active hunting and eating small game which became an evaluationary stepping Stone to the human behavior of hunting large animals.The argue was that this theory does not make nutritional sense. The meal of wild animals is lean,it actually takes more work to metabolize Lean protein than you get back.
In fact eating Lean meat without a good source of fat can lead to protein poisoning and acute malnutrition.
Early ardic explorers who attempt to survive on a rabbit meat exclusively described the condition as rabbit starvation.
This protein problem, coupled with the energy required for an upright "ape" with small canines to capture and eat small animals, would seem to rule out eating meat as a path way to fueling brain growth.
The new paper present a new hypothesis, going back 4 million years a go, to the Pliocene. As the human ancestor began walking primarily on two legs, heavily forested region of Africa were breaking into mosaics, creating open grassland.
The bones
sealed up the
marrow like
a
Tupperware
container_
Our human ancestors were likely awkward creatures, they were not good in trees like chimpanzees are,but they were not necessarily all that good on the ground either, so what they did the first walking apes in our lineage do to make them successful? At this stage, there was already a small increase in the size of the brain.How were they feeding that?
It was proposed by researchers that our early ancestors wielded rocks as they for aged On open grassland. After a predator had finished eating a large mammals, these upright"apes"explored the leftovers by smashing them discovered the marrow hidden in the limp bones.
The bones sealed up the marrow like a Tupperware container, preventing bacterial growth, and the only things that could crack open these containers were the bone_cracking jaws of hyenas or clever ape wielding a rock.
The hypothesis offers an explanation for how the human ancestors may have garnered The extra calories needed to foster a larger brain, long before there is evidence for controlled fire ,which could have mitigated the problem of bacteria in rotting scavenged meat.
The fat hypothesis also predators by more than 1 million years most evidence for even basic tool making of simple stone flakes.
BONE SMASHING
Scientists ought to begin looking for evidence of bone smashing behavior in early human ancestors.paleothropologists are looking for mostly complete bones,and then concentrate on identifying the animal that died.
But instead of just wondering about the bones creature of origin.we should be asking what broke this bone?we need to start collecting tiny pieces of shattered bone to help piece together this kind of behavioral information.
It's suggested that our early ancestors acquired a taste for fat by eating marrow scavenged from remains of large animals that other predators killed and ate.
The argument challenges the widely held view among anthropologists that eating meat was acritical factor in setting the stage for the evolution of humans.
That is all technology originated---Thar is the origin of IPhone right here.
Our ancestors likely began acquiring a taste for fat 4 million years a go, which explain why we crave it today.
The reservoirs of the fat in the long bones of car causes were a huge calorie_poor landscape. That could have been what gave an ancestral population the advantage it needed to set off the chain of human evolution.
While focusing On fat over meat may seem likely a subtle distinction, the difference is significant. The nutrient of meat and fat are different, as are technologies requires to require access them,meat eating is traditionally paired with the manufacture of Sharp, flaked_Stone tools,while obtaining fat_rich marrow only required smashing bones with a rock.
Reviewed evidence that a craving for marrow could fueled not just a growing brain size but the guest to go beyond smashing bones with rocks to make more sophisticated tools and to hint large animals.
That is all technology originated_Taking one thing and using it to alter something else.
HUNGRY BRAINS
The human brain consumes 20 percent of the body's energy at rest, or twice that the brains of other primates, which are almost exclusively vegetarian. It is a mystery to scientists how our human ancestors met the calorie demands to develop and sustain our large brains.
A meat centered paradigm for human evolution hypothesizes that an "ape" population began more active hunting and eating small game which became an evaluationary stepping Stone to the human behavior of hunting large animals.The argue was that this theory does not make nutritional sense. The meal of wild animals is lean,it actually takes more work to metabolize Lean protein than you get back.
In fact eating Lean meat without a good source of fat can lead to protein poisoning and acute malnutrition.
Early ardic explorers who attempt to survive on a rabbit meat exclusively described the condition as rabbit starvation.
This protein problem, coupled with the energy required for an upright "ape" with small canines to capture and eat small animals, would seem to rule out eating meat as a path way to fueling brain growth.
The new paper present a new hypothesis, going back 4 million years a go, to the Pliocene. As the human ancestor began walking primarily on two legs, heavily forested region of Africa were breaking into mosaics, creating open grassland.
The bones
sealed up the
marrow like
a
Tupperware
container_
Our human ancestors were likely awkward creatures, they were not good in trees like chimpanzees are,but they were not necessarily all that good on the ground either, so what they did the first walking apes in our lineage do to make them successful? At this stage, there was already a small increase in the size of the brain.How were they feeding that?
It was proposed by researchers that our early ancestors wielded rocks as they for aged On open grassland. After a predator had finished eating a large mammals, these upright"apes"explored the leftovers by smashing them discovered the marrow hidden in the limp bones.
The bones sealed up the marrow like a Tupperware container, preventing bacterial growth, and the only things that could crack open these containers were the bone_cracking jaws of hyenas or clever ape wielding a rock.
The hypothesis offers an explanation for how the human ancestors may have garnered The extra calories needed to foster a larger brain, long before there is evidence for controlled fire ,which could have mitigated the problem of bacteria in rotting scavenged meat.
The fat hypothesis also predators by more than 1 million years most evidence for even basic tool making of simple stone flakes.
BONE SMASHING
Scientists ought to begin looking for evidence of bone smashing behavior in early human ancestors.paleothropologists are looking for mostly complete bones,and then concentrate on identifying the animal that died.
But instead of just wondering about the bones creature of origin.we should be asking what broke this bone?we need to start collecting tiny pieces of shattered bone to help piece together this kind of behavioral information.
Comments