background preloader

Science/ Medicine

Facebook Twitter

Heatmaps of the human body in varying emotional states. Oldest Human DNA Ever Sequenced Could Rewrite Human Evolutionary Tree. Researchers have managed to sequence a section of the oldest human DNA ever, taken from the 430,000-year-old teeth and thigh bones of fossils found in northern Spain.

Oldest Human DNA Ever Sequenced Could Rewrite Human Evolutionary Tree

What they’ve been able to determine from this impressive feat could rewrite the evolutionary tree of ancient human species, including those that eventually gave rise to us. Starting in 1997, archaeologists have excavated the remains of around 28 skeletons thought to date to around 430,000 years old from a cave in northern Spain known as Sima de los Huesos, or “pit of bones.” The skulls of these individuals appear to show the beginnings of the formation of a heavy brow ridge, and so it was thought that they represented early Neanderthals, who would eventually evolve into the fully recognized species 100,000 years later. But new evidence, published in Nature, from sequencing parts of the fossil's nuclear DNA suggests that these were not early ancestors to the species at all, but were fully recognized Neanderthals. What happens in our brains when we hallucinate? - Science News.

Posted Voices in your head?

What happens in our brains when we hallucinate? - Science News

Visions of things that aren't there? Astronomers discover the biggest object in the Universe so far - the BOSS Great Wall. As if staring up at the night sky didn’t make us feel small already, astronomers have recently announced the discovery of the BOSS Great Wall, a group of superclusters that span roughly 1 billion light-years across and represents the largest structure ever found in space.

Astronomers discover the biggest object in the Universe so far - the BOSS Great Wall

The BOSS Great Wall, which sounds aptly named for its size but actually stands for the Baryon Oscillation Spectroscopic Survey, is a string of superclusters connected by gases lying roughly 4.5 to 6.5 billion light-years away from Earth. Thanks to gravity, these superclusters stay connected and swirl together through the void of space. According to Joshua Sokol at New Scientist, the megastructure discovered by a team from the Canary Islands Institute of Astrophysics is composed of 830 separate galaxies and has a mass 10,000 times greater than the Milky Way. To put the scale of this structure into perspective, we orbit one single star, the Sun. "Genetic Scissors" Can Completely Eliminate HIV From Cells.

How the Human Heart Functions as a Second Brain. The word “heart” is an anagram for the word “earth”.

How the Human Heart Functions as a Second Brain

Hence, the phrase “home is where the heart is”. Did you know that the human heart is the organ that generates the strongest electromagnetic field of any organ of the human body? In fact, the electromagnetic field of your heart can be measured up to a few feet away from your body. Furthermore, this energy field changes in relation to your emotions. One thing you should know about electromagnetic field is that every organ and cell in your body generate an energy field. Are we more than molecules? Uk.businessinsider. Doctors often tell patients to take a “course” of antibiotics, because a partially treated infection may result in relapse with antibiotic-resistant bacteria.

uk.businessinsider

10 Brain Myths Busted. Ayahuasca: This Amazonian Brew May Be the Most Powerful Antidepressant Ever Discovered. Recent studies show that this Amazonian healing elixir has the power to alleviate feelings of depression in just a few hours, with lasting positive changes.

Ayahuasca: This Amazonian Brew May Be the Most Powerful Antidepressant Ever Discovered

After centuries of being labeled as primitive, traditional medicines are slowly making a comeback, especially in academia. The more research that’s conducted on traditional remedies, the more scientists must bow to the wisdom of our ancestors, as well as contemporary indigenous healers who are carrying these traditions forward. One of the most powerful traditional remedies is ayahuasca. Nod if you agree: Your head reveals your emotions. When a friend shares an embarrassing secret, you may try to hide your reaction with a poker face.

Nod if you agree: Your head reveals your emotions

But your head reveals the truth. Samantha Okazaki / TODAY TODAY: What does the angle of your head say about your mood? A recent study finds that how people tilt their heads — either holding them high or casting eyes downward —conveys happiness and sadness, respectively, which people easily detect. Steven Livingstone and his colleagues at the Sequence Production Lab at McGill University conducted two experiments to determine whether head movement betrays emotion. Scientists discover the on-off switch for human consciousness deep within the brain. Researchers at George Washington University are reporting that they’ve discovered the human consciousness on-off switch, deep within the brain.

Scientists discover the on-off switch for human consciousness deep within the brain

Blindsight: the strangest form of consciousness. When Daniel first walked into London’s National Hospital, ophthalmologist Michael Sanders could have had little idea that he would permanently alter our view of human consciousness.

Blindsight: the strangest form of consciousness

Daniel turned up saying that he was half blind. Although he had healthy eyes, a brain operation to cure headaches seemed to have destroyed a region that was crucial for vision. Are Our Emotional Reactions Hardwired? We all know people who immediately burst into laughter after a humorous moment, while others can barely crack a smile.

Are Our Emotional Reactions Hardwired?

New research may provide an explanation for this observation as scientists have discovered a person’s emotional reactivity may begin in their DNA. In a new study linking a gene to positive emotional expressions — such as smiling and laughing — researchers demonstrated that people with a certain genetic variant smiled or laughed more while watching cartoons or subtly amusing film clips than people with a different makeup of a particular gene. Specifically, researchers found that those with short alleles of the gene 5-HTTLPR smiled or laughed more than people with long alleles. Previous research has linked this gene to negative emotions. The new study provides the strongest evidence to date that the same gene is also linked to positive emotional expressions. The research has been published online in the American Psychological Association journal Emotion. Reflexology Proves Beneficial For Non-Cardiology Patients. In a study examining the effects of reflexology in healthy patients and patients with heart disease, researchers have found that applying pressure to the upper the heart reflex point on the left foot had an effect on the hearts of healthy patients but not on those with cardiac disease.

The study, conducted by researchers at the University of Stirling, found that massage to the heart reflex point had a small effect on heart function in healthy patients but not in the hearts of cardiology patients. In addition, they found that when pressure was applied to areas of the feet not related to the heart there was not change in heart function. According to reflexologists, each part of the hands and feet are connected with specific organs in the body.

Applying pressure with specific thumb, finger, and hand techniques to specific organ reflex points is believed to increased blood flow to the organ. 7 warning symptoms of typhoid. Caused by the bacterium Salmonella typhi, typhoid spreads easily through contaminated food and water. If you have recently had food or water from an unhygienic place, look out for these symptoms . High fever:Once the pathogen starts multiplying after gaining entry into your system, the body increases temperature as its primary defense to kill them either directly, or through the action of certain immune cells that show improved function with elevated body temperature. The typical changes in the pattern of fever are a key indicator in suspecting typhoid. Uld Oxygen Make Cancer Therapy Work Better? Searchers have been looking for years for a way to use oxygen to fight cancer. Now, they may finally have one. A new study finds that giving high-dose oxygen may help efforts to stimulate the immune system against tumors.

The study’s only been done in mice and hasn’t been shown safe in people yet — but it does open some possibilities, the researchers report in the journal Science Translational Medicine. “This is exciting work,” said Susanna Greer, director of clinical research and immunology for the American Cancer Society. Kentucky's New Heroin Law Makes A 'Culture Shift'

Study Shows New Diet Lowers Risk of Alzheimer’s. A new diet, known by the acronym MIND, has been found to significantly reduce a person’s risk of developing Alzheimer’s disease (AD), even when the diet is not strictly followed, according to new research published in Alzheimer’s & Dementia: The Journal of the Alzheimer’s Association. Study shows humans are evolving faster than previously thought. Humans are evolving more rapidly than previously thought, according to the largest ever genetics study of a single population. Scientists reached the conclusion after showing that almost every man alive can trace his origins to one common male ancestor who lived about 250,000 years ago. A Man's Incomplete Brain Reveals Cerebellum's Role In Thought And Emotion. Criminal Minds Are Different From Yours, Brain Scans Reveal. Oldest Human Fossil Found, Redrawing Family Tree.

The likely cause of addiction is not what you think. Drug addictions could come from places you didn’t expect. Extract: A man walks off his Parkinsonian symptoms. My walking companion, John Pepper, was diagnosed with Parkinson’s disease, a movement disorder, over two decades ago. He first started getting symptoms nearly 50 years ago. AMFI - Herbal Medicine Resource Guide - Nightly. Half-male, half-female bird has a rough life. Big 5 Personality Traits Test. Stroke has a new indicator. Psychology: The truth about the paranormal. Algae Virus May Be Changing Cognitive Ability. Magic Mushrooms Create a Hyperconnected Brain. Magic mushrooms may give users trippy experiences by creating a hyperconnected brain. The active ingredient in the psychedelic drug, psilocybin, seems to completely disrupt the normal communication networks in the brain, by connecting "brain regions that don't normally talk together," said study co-author Paul Expert, a physicist at King's College London.

This Is What Schizophrenia Can Actually Sound Like. Benoit Mandelbrot: Fractals and the art of roughness. Antimicrobial resistance: global report on surveillance 2014. Artists 'have structurally different brains'. Honey is a new approach to fighting antibiotic resistance: How sweet it is! Plants Are Capable of Making Complex Decisions. En el futuro nacerían cerdos con órganos humanos. Here's A Horrifying Picture Of What Sleep Loss Will Do To You. The Arrow of Time feat. Sean Carroll.

You Can't See It, But You'll Be A Different Person In 10 Years : Shots - Health News. Six Famous Thought Experiments, Animated in 60 Seconds Each. This Microbial Battery Makes Power And Water From Poop And Pollution. Antibiotic-resistant diseases pose 'apocalyptic' threat, top expert says.

The Nature of Consciousness: How the Internet Could Learn to Feel - Steve Paulson. Scientific evidence for survival of consciousness after death. What Does It Mean to Be Human? A haunting short film about the ways a body moves after death. There’s one key difference between kids who excel at math and those who don’t. Biologists Discover Tiny Neural Computers in the Brain. How Imagination Works. Phobias may be memories passed down in genes from ancestors. Explained at last: life, the universe and everything. Smic inflation: 'Spectacular' discovery hailed. Vintage anatomical charts of the male and female body, as animated GIFs.