Top 10 Human Origins Discoveries in 2015

Top 10 Human Origins Discoveries in 2015

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5. Teeth Found in China May Point to Mysterious New Human Species

Teeth Found in China May Point to Mysterious New Human Species

A study of skull fragments and teeth discovered in 1976 in a cave in Xujiayoa, China suggests that there may well have been multiple species of primitive humans between 60,000 and 120,000 years ago – including a mysterious people who do not fall under the categories of either Neanderthals, Denisovans, or modern humans.

Dental remains were recovered from the fragments that identify to four individuals. These were examined for size, shape and surface of the teeth, as well as other defining characteristics. When the teeth were compared to a database of over 5,000 teeth of known species, they did not match any of the accepted hominids. The question is now whether the teeth represent a hybrid of Denisovans and modern humans, or whether scientists have an entirely new human species on their hands.

4. 10,000-year-old Human Remains Found in Underwater Cave in Mexico

10,000-year-old Human Remains Found in Underwater Cave in Mexico

In May last year, archaeologists made the exciting announcement that a complete Ice Age skeleton had been found in an underwater cave in Tulum, Mexico. Since then, more than eight well-preserved skeletons, ranging in age from 9,000 to 13,000 years have been retrieved from cenotes in Mexico and now scientists have begun to unravel the secrets that they may hold about early migration in the Americas.

The differences in skull shapes between the current indigenous people of Mexico and the Ice Age samples led some experts to argue that Native Americans arrived in a later migration to the earliest inhabitants, who came from elsewhere.  According to this theory, the first wave of people was an Asian group that arrived more than 15,000 years ago via the Bering Strait, at the easternmost tip of Siberia and Alaska (the Paleoamericans), while a second migration wave occurred around 8,000 – 9,000 years ago and are the ancestors of today’s Native Americans. However, until further evidence emerges, it cannot yet be determined whether the differences in skull features between Paleoamericans and later Native Americans is accounted for by evolution or by two distinct migrations.

3. Neanderthals Twice as Old as Thought

Neanderthals Twice as Old as Thought

DNA from fossils from the Sima de los Huesos (“pit of bones”) cave in Spain show that Neanderthals are almost twice as old as previously thought, having emerged up to 765,000 years ago.

The scientists sequenced DNA from a prehistoric tooth and a leg bone, dating them to between 300,000 and 400,000 years old. They also identified one million to two million base pairs of ancient nuclear DNA, which is the oldest partial genome ever sequenced.

The findings “could lead to a dramatic shake up of the current shape of the human family tree,” as it was previously believed that Homo sapiens (modern humans) only emerged in Africa 200,000 years ago before they spread across the world. Neanderthals were believed to have evolved in Eurasia from a common ancestor. The new genome results create an earlier timeline for both species, and thus an earlier split in the evolutionary tree.

2. Ancestors Had More DNA Than We Do Now: Have we Devolved?

Ancestors Had More DNA Than We Do Now: Have we Devolved?

A study published in August asserts that modern humans lost DNA as we evolved after our split from apes. Our ancient ancestors, early humans, possessed substantially more amounts of genetic data than we do now. This surprising discovery raises many questions, the most obvious one being: why did we lose all that genetic information? Also, what difference has the loss made? The short answer is: we don’t know yet. This is the first time scientists have documented the loss (and gain) of large chunks of DNA in ancient populations.

The geneticists sequenced the genomes of 236 individuals from 125 distinct populations. They found that Homo sapiens  have shed approximately 40.7 million base pairs of DNA after breaking from our closest living relatives, chimpanzees, around 13 million years ago. Furthermore, at least 27.96 million of the base pairs lost were unique.

1. Fossilized Pre-Human Creature Lived 3.67 Million Years Ago

Fossilized Pre-Human Creature Lived 3.67 Million Years Ago

Scientists also announced an earlier time frame than previously estimated for the lifetime of an early proto-human dubbed Little Foot – as much as 3.67 million years ago. The nearly complete fossilized skeleton of the small Australopithecus creature was found in Sterkfontein Cave in South Africa in the 1990s.

Age estimates of the fossil have varied greatly over the years, but new dating methods have allowed a more precise estimate. ‘It was impossible to fit Little Foot into the human family tree with any certainty because “ever since its discovery, the age of Little Foot has been debated,” said lead study author Darryl Granger, a geochronologist at Purdue University in West Lafayette, Indiana. ‘If researchers can figure out when Little Foot arose, they might be able to better pinpoint which Australopithecus species and which part of Africa ultimately gave rise to Homo.’

Comments

FINALLY SOLVED : https://evolutionofhumanintelligence.wordpress.com/
The human evolution must perform the evolution of intelligence, but I have found only "the evolution of emotions". These three processes intersect at one point - baby / human infant that is incapable for independent survival for many years. That is not an evolutionary mistake, on the contrary, that is the key element. By observing his mother’s behavior, a process called MSP/multi self-projection passively occurs in baby’s brain when child perceives guardians body as his own. That way infant’s CNS immediately learns the shortest way to get something done which enables the creation of many more similar thinking processes till the moment when a minimal number of thinking processes are required in order to effect of self-consciousness arise.
To connect all this with a huge number of scientific data (Denisovans, Homo naledi, Scientific Adam, Mitochondrial Eve, autism, speech, pleasure in the presence of fire, dreams...) required membership in the Mensa organization... The biggest picture ( the framework ) for all scientific data ( even A.I. because start, origin of original, in making AI is crucial / what has been missing) is FEST theory.

Could the loss of DNA over the years be contributed to the way humans control their environment, for example if a human gives natural birth it is usually done in a hospital. An animal can give. Birth usually without the help of anyone else. And humans also have trouble eating raw meat compared to domesticated pets.

Troy Mobley

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