Submitted by Diana Bretting on Fri, 04/08/2016 - 15:58
This might be the case that incompatibilities in the DNA of Neanderthals and modern humans restricted the impact of interbreeding between these two groups. Now, it is commonly known that a number of modern humans have 4% Neanderthal DNA.
However, a latest analysis of the Neanderthal Y chromosome, which is the genes’ package passed down from fathers to sons, has demonstrated that it is absent in modern populations.
Submitted by Karan Gosal on Sun, 04/03/2016 - 14:51
Till date, archaeological site L’Anse aux Meadows is considered as the only Viking site in the Western Hemisphere. Now, archaeologists have discovered another Viking site with the help of satellite imagery. They believe the discovery may unravel more about the history of Vikings.
As per historians, Vikings traveled long distance to enter North America about a thousand years ago. Discovery of the new site in North America may allow researchers to rewrite understandings about Vikings, who are famous for their fearsome conquests.
Submitted by Luis Georg on Fri, 04/01/2016 - 14:56
Extinct species Homo floresiensis discovered in Indonesia more than a decade ago vanished much earlier than previously estimated, suggests a new study. The study also stated that modern humans could be behind the extinction of this mysterious and diminutive species.
Submitted by Joseph Gibson on Mon, 03/28/2016 - 11:30
In an attempt to examine a gene’s function, researchers picked a bacterium’s DNA. The aim was to determine minimum set of genes required for life, as per the researchers.
They designed a synthetic microbe that is capable of living with just 473 genes. Compared with human genome that has over 19,000 genes, the newly developed microbe has very few genes, the minimum achieved till date. The new development could help in leading to new research in genetic sciences, said researchers at the J. Craig Venter Institute.
Submitted by Karan Gosal on Wed, 03/23/2016 - 12:23
Viral DNA strands have been found in a genome analysis conducted on data for 2,500 individuals from across the world. Already 17 pieces of viral DNA in the human genome have been discovered in studies conducted in the past. In a new study funded by the National Institutes of Health, 19 new pieces left by viruses in human ancestors thousands of years have been discovered. Researchers from Tufts University and the University of Michigan Medical School have also found a complete stretch of DNA with full genetic code for an entire virus.
Submitted by Diana Bretting on Mon, 03/21/2016 - 16:51
Listeria outbreak is making news since 2014, but no ultimate cause has been detected till now. However, recently federal health officials while tracing the infection came to conclusion that raw milk sold by Miller's Organic Farm in Bird-In-Hand, Pennsylvania, is responsible for this outbreak. The raw milk was found containing the bacteria-causing listeria infection. People who were drinking unpasteurized milk or used milk products from farms have contracted the infection.
Submitted by Karan Gosal on Sat, 03/19/2016 - 11:58
Modern human’s ancestors interbred with Neanderthals and another species of early humans on multiple occasions, as per a new study. It suggests our ancestors interbred with Neanderthals and Denisova hominin on at least four separate occasions in the past.
Our improved immunity to pathogens is the result of that prehistoric mating, said the study authors. “This is yet another genetic nail in the coffin of our over-simplistic models of human evolution”, said Carles Lalueza-Fox of the Institute of Evolutionary Biology. Lalueza-Fox wasn’t part of the study.
Submitted by Luis Georg on Sat, 03/12/2016 - 11:02
With little food processing and introduction of meat in the diet, ancient humans might have reduced the need for chewing food. With lower count of chews per meal, they were having time for more activities. Also, adding meat played an important role as it had higher nutritional value compared to vegetarian diet.
Human skeletons started changing in notable and puzzling ways when our genus, Homo, got separated from other hominins more than 2.8 million years back. For example, Homo erectus was quite taller and possessed a bigger brain case as compared to the Australopith ancestors.
Submitted by Luis Georg on Tue, 02/16/2016 - 11:01
Demolition work at the Pennsylvania University (UPENN) has raised fear for some precious and ancient artifacts at Penn Museum. The authorities decided to shift them elsewhere following concerns over their fragility. A 23-story medical office tower and 850-car parking garage is being demolished to give way to a hospital pavilion, which will be constructed soon.
Submitted by Joseph Gibson on Thu, 02/04/2016 - 06:20
A new archeological discovery at the famous Qesem cave site in Israel revealed that prehistoric cave-dwellers ate tortoises as an appetiser or side dish, the latest edition of the journal Quaternary Science Reviews reported.
A team of researchers discovered tortoise remains in large quantities at the Qesem cave site, which has long been a hotbed for archeological research on ancient humans. The researchers determined that ancient hunter-gatherers used to crack open tortoises and ate them as side dish on top of the large game.