Scientists believe that Eurasians separated into at least three populations around 36,000 years ago: Europeans,Asians and a mystery third lineage, all whose descendants would develop the unique features of most non-African peoples after interbreeding with Neanderthals.
A new study on DNA recovered from a fossil of one of the earliest known Europeans, who lived 36,000 years ago in Kostenki, western Russia, has shown that the earliest European humans' genetic ancestry survived the Last Glacial Maximum - the peak point of the last ice age.
Reconstructing ancient life has long required a certain amount of inference and imagination - especially speculative is the coloration of long-extinct organisms.
New methods of investigation are being incorporated into paleontology that may shed light (and color) on fossils.
Since 1999, a conjecture by Asher Peres, the 'inventor' of quantum teleportation, that the weakest form of quantum entanglement can never result in the strongest manifestation of the phenomenon, has been debated.
Peres thought about the phenomenon of quantum entanglement and its different manifestations. When two objects (take photons, for example) are entangled, they remain correlated regardless of the distance that separates them physically: whether they are separated by a millimeter or by several kilometers, any action done to one of them will immediately affect the other. To check whether a system is entangled, scientists test for Bell's inequality.
A new study finds that the inhibition of a particular mitochondrial fission protein, GTPase dynamin-related protein-1 – Drp1, could hold the key to treating Parkinson's Disease.-->
A new biology paper sheds light on how chromatin (the complex of DNA and proteins) is organized in a cell and how plants regulate genetic material, so that some genes are turned on and others are turned off - and it could make it possible for a new generation of plants to better adapt to and survive environmental swings such as droughts or floods.
The research in The Plant Cell could mean major advances for the agriculture industry.
"If you understand how plants regulate their genetic material, you can possibly manipulate that in certain circumstances so that plants can withstand environmental changes," said Daniel Vera, a Florida State University graduate student and the lead author of the paper.
By Deirdre McGhee, University of Wollongong
This year marks the 100-year anniversary of the first bra patent.
Amazingly for the time – 1914 – it was made by a woman in her twenties, Mary (Polly) Phelps Jacob (nee Crosby).
Polly made her bra initially from two handkerchiefs and some ribbon with the intent to show off her substantial cleavage in a sheer evening gown that had a plunging neckline. The handkerchiefs formed the bra cups and the ribbons formed the straps.-->
The location of oral cancers differ in smokers and nonsmokers and nonsmokers have a higher proportion of cancers occur on the edge of the tongue, according to a new paper in JAMA Otolaryngology-Head&Neck Surgery.
Induced pluripotent stem cells (iPSCs) and somatic cell nuclear transfer (SCNT)-derived cells are world's apart. iPSCs became a major research force because they are adult stem cells and lack the controversy of human embryonic stem cells (hESCs) while SCNT is banned by the Obama administration even though most biologists are in favor of it.
Yet that is politics. Scientifically, they have far more in common, which makes the scientization of politics issue more odd. A team led by the New York Stem Cell Foundation (NYSCF) Research Institute did a study comparing iPS cells and embryonic stem cells created using SCNT and they found that the cells derived from these two methods resulted in cells with highly similar gene expression and DNA methylation patterns.
By Daniel Bennett, University of Melbourne
What makes us decide? At one level, this seems like an easy question: we think our options through, pick the one we like best and act on it.
If we dig a little deeper, though, the question becomes more difficult to answer. How do we settle on what our options are? What makes us prefer one option to another?-->
The XZ Tauri star system has been imaged blowing a hot bubble of gas into the surrounding space, which is filled with bright and beautiful clumps that are emitting strong winds and jets. These objects illuminate the region, creating a truly dramatic scene.
This dark and ominous landscape is located some 450 light-years away in the constellation of Taurus The Bull. It lies in the north-eastern part of a large, dark cloud known as LDN 1551, as seen in the Hubble telescope image below..
Many large mammals went extinct at the end of the most recent Ice Age (about 11,000 years ago), including the Steppe bison, Bison priscus.
Recently an intact one was found, literally frozen in time. This most complete frozen mummy of the Steppe bison yet discovered dates to 9,300 years ago and was uncovered in the Yana-Indigirka Lowland.
The Yukagir bison mummy, as it is named, has a complete brain, heart, blood vessels and digestive system, although some organs have shrunk significantly over time. The necropsy of this unique mummy showed a relatively normal anatomy with no obvious cause of death. However, the lack of fat around abdomen of the animal makes researchers think that the animal may have died from starvation.
Arm pain is common among healthy young baseball players, according to a recent survey. Nearly half say they have been encouraged to keep playing despite arm pain, which suggests that more individualized screening is needed to prevent overuse injury in young ballplayers.
The questionnaire was designed to learn more about the frequency, severity, and psychosocial effects of arm pain among active adolescent baseball payers. The questionnaire was completed by 203 players from New York and New Jersey between the ages of 8 and 18. All of the surveys were completed without input from parents or coaches.
Tiny biobots - cyborg cockroaches - can trace the source of a sound and home in on it. But don't fear, an invisible fence keeps them in their assigned area, which would be disaster areas to find victims.
The biobots are equipped with electronic backpacks that control the cockroach's movements. Bozkurt's research team has created two types of customized backpacks using microphones: One type of biobot has a single microphone that can capture relatively high-resolution sound from any direction to be wirelessly transmitted to first responders.
A fossil of the ancient horse Eurohippus messelensis found in Germany contains a fetus as well as parts of the uterus and associated tissues.
Eurohippus messelensis had four toes on each forefoot and three toes on each the hind foot, and it was about the size of a modern fox terrier. Though different in size and structure, reproduction in early horses was very similar to that of modern horses. The new find was unveiled at the 2014 Annual Meeting of the Society of Vertebrate Paleontology in Berlin.
John F. Kennedy didn't just win the presidential election in 1960 because an alarming number of dead people in Chicago and Texas voted for him, it was only close in the first place because his debate with Vice-President Richard Nixon was televised - and he thought makeup was unmanly. While Kennedy looked healthy and vigorous, Nixon looked pale and sweaty. History was made and politics was changed forever.
Two generations later, a healthy complexion is vital - but looking intelligent is not as important, except for positions that require negotiation between groups or exploration of new markets, find the authors of a paper in Frontiers in Human Neuroscience.
A new index to measure the magnitude of heat waves finds that under the worst climate scenario of temperature rise, estimated to be as much as 8.6 degrees Fahrenheit, extreme heat waves might become the norm by the end of the century.
They project that heat waves like the one that hit Russia in summer 2010, the strongest in recent decades, could occur as often as every two years.
There's a new reason not to go on a low-fat diet. The signs of brain aging can be postponed in mice if placed on a high-fat diet, which opens up the possibility for treatment of patients with Alzheimer's and Parkinson's disease.
When we get older, defects begin to develop in our nervous system and our brain loses some of its intellectual capacity. The risk of developing diseases such as Parkinson's and Alzheimer's also increases. Alzheimer's disease is currently the fastest-growing age-related disease.
Fast testing for bacterial infections may help to reduce excessive antibiotic use, finds a systematic review. When doctors tested for the presence of bacterial infections, they prescribed fewer antibiotics.