1. 09:33 19th Sep 2014

    notes: 10509

    reblogged from: micahaphone

    tags: biology

    fuckyeahfluiddynamics:

In the dark of the ocean, some animals have evolved to use bioluminescence as a defense. In the animation above, an ostracod, one of the tiny crustaceans seen flitting near the top of the tank, has just been swallowed by a cardinal fish. When threatened, the ostracod ejects two chemicals, luciferin and luciferase, which, when combined, emit light. Because the glow would draw undesirable attention to the cardinal fish, it spits out the ostracod and the glowing liquid and flees. Check out the full video clip over at BBC News. Other crustaceans, including several species of shrimp, also spit out bioluminescent fluids defensively. (Image credit: BBC, source video; via @amyleerobinson)

    fuckyeahfluiddynamics:

    In the dark of the ocean, some animals have evolved to use bioluminescence as a defense. In the animation above, an ostracod, one of the tiny crustaceans seen flitting near the top of the tank, has just been swallowed by a cardinal fish. When threatened, the ostracod ejects two chemicals, luciferin and luciferase, which, when combined, emit light. Because the glow would draw undesirable attention to the cardinal fish, it spits out the ostracod and the glowing liquid and flees. Check out the full video clip over at BBC News. Other crustaceans, including several species of shrimp, also spit out bioluminescent fluids defensively. (Image credit: BBC, source video; via @amyleerobinson)

     
  2. 09:14 25th Aug 2014

    notes: 8557

    reblogged from: tapdancingfairy

    tags: biologybrain

    jupiter2:

This Is Your Brain
University of California researchers have created  a system that shows how the brain works in real time, allowing users to navigate right inside their own heads and see their neuronal activity firing in 3D.
Each color represents source power and connectivity in a different frequency band (theta, alpha, beta, gamma) and the golden lines are white matter anatomical fiber tracts. Estimated information transfer between brain regions is visualized as pulses of light flowing along the fiber tracts connecting the regions.

    jupiter2:

    This Is Your Brain

    University of California researchers have created  a system that shows how the brain works in real time, allowing users to navigate right inside their own heads and see their neuronal activity firing in 3D.

    Each color represents source power and connectivity in a different frequency band (theta, alpha, beta, gamma) and the golden lines are white matter anatomical fiber tracts. Estimated information transfer between brain regions is visualized as pulses of light flowing along the fiber tracts connecting the regions.

     
  3. rhamphotheca:

    Largest Dinosaur Known Found in Argentina

    by Virginia Avalos

    Paleontologists in Argentina’s remote Patagonia region have discovered fossils of what may be the largest dinosaur ever, amid a vast cache of fossils that could shed light on prehistoric life.

    The creature is believed to be a new species of Titanosaur, a long-necked, long-tailed sauropod that walked on four legs and lived some 90 million years ago in the Cretaceous Period.

    Researchers say the plant-eating dinosaur weighed the equivalent of more than 14 African elephants, or about 100 tonnes, and stretched up to 40 meters (130 feet) in length.The previous record holder, also in Argentina, the Argentinosaurus, was estimated to measure 36.6 meters long…

    (read more: PhysOrg)

    images: MEF

     
  4. 09:56 28th Feb 2014

    notes: 42922

    reblogged from: scifigeneration

    tags: biology

    image: download

    scifigeneration:

Maps of bodily sensations associated with different emotions. Hot colors show activated, cool colors deactivated regions.
Credit: Lauri Nummenmaa, Enrico Glerean, Riitta Hari, and Jari Hietanen.
Source: People worldwide may feel mind-body connections in same way (Medical Xpress)
More info.: Bodily maps of emotions (PNAS)
via scienceisbeauty

Happiness = Human Torch, Anxiety = Iron Man, Depression = Doctor Manhattan, Shame = Spider-Man. 

    scifigeneration:

    Maps of bodily sensations associated with different emotions. Hot colors show activated, cool colors deactivated regions.

    Credit: Lauri Nummenmaa, Enrico Glerean, Riitta Hari, and Jari Hietanen.

    Source: People worldwide may feel mind-body connections in same way (Medical Xpress)

    More info.: Bodily maps of emotions (PNAS)

    via scienceisbeauty

    Happiness = Human Torch, Anxiety = Iron Man, Depression = Doctor Manhattan, Shame = Spider-Man. 

     
  5. 09:06 20th Feb 2014

    notes: 225

    reblogged from: neurosciencestuff

    tags: biologybrain

    image: download

    neurosciencestuff:

The Hidden Costs of Cognitive Enhancement
Gentle electrical zaps to the brain can accelerate learning and boost performance on a wide range of mental tasks, scientists have reported in recent years. But a new study suggests there may be a hidden price: Gains in one aspect of cognition may come with deficits in another.

Follow the link for the complete article, very interesting. 

    neurosciencestuff:

    The Hidden Costs of Cognitive Enhancement

    Gentle electrical zaps to the brain can accelerate learning and boost performance on a wide range of mental tasks, scientists have reported in recent years. But a new study suggests there may be a hidden price: Gains in one aspect of cognition may come with deficits in another.

    Follow the link for the complete article, very interesting. 

     
  6. 08:55 6th Jan 2014

    notes: 90

    reblogged from: oupacademic

    tags: biologythanks for the fish

     
    • January 4: Britain’s first hand transplantation operation is successfully conducted.
    • January 9: A gamma secretase inhibitor previously experimented for treating Alzheimer’s disease is found to have regenerative effects on inner ear hair cells, potentially allowing for the effective treatment of deafness
    • January 10: Half of all food is wasted worldwide, according to a new report by the British Institution of Mechanical Engineers (IME)
    • January 23: Scientists encode large amounts of digital information, including the complete sonnets of William Shakespeare, on a single strand of synthetic DNA. DNA has immense potential as a storage medium, and may become commercially available for this purpose in the near future.
    • March 14: CERN scientists confirm, with a very high degree of certainty, that a new particle identified by the Large Hadron Collider in July 2012 is the long-sought Higgs boson
    • March 29: The Neanderthal genome is sequenced by German scientists from a toe bone found in southern Siberia.
    • May 22: Researchers at Purdue University in West Lafayette, Indiana, report that Earth is pushing the Moon away more quickly than it has done for most of the past 50 million years
    • July 16:NASA’s Curiosity rover reaches a milestone in its journey across Mars, having travelled 1 kilometre (0.62 mi) since its landing in 2012
    • November 17: Researchers have made the first battery electrode that heals itself, repairing imperfections within a few hours.

    and a lot more…

     
  7. image: download

    explore-blog:

This charming portrait of Charles Darwin and his fox terrier Polly by London-based illustrator Kerry Hyndman is the sweetest thing since this photo of Maurice Sendak and his German shepherd Herman. Pair with literary history’s notable pets and the authors who loved them.

On the Origin of Species was published on November 24 1859

    explore-blog:

    This charming portrait of Charles Darwin and his fox terrier Polly by London-based illustrator Kerry Hyndman is the sweetest thing since this photo of Maurice Sendak and his German shepherd Herman. Pair with literary history’s notable pets and the authors who loved them.

    On the Origin of Species was published on November 24 1859

     
  8. 09:31 18th Oct 2013

    notes: 12724

    reblogged from: an-animal-imagined-by-poe

    tags: biology

    jtotheizzoe:

    scientificvisuals:

    Microscopic life in a single drop of pond water. Peter Matulavich/Science Photo Library. Source here (definitely watch).

    A universe of wee beasties… although moving around is hard at that scale, thanks to the physics of fluid dynamics. Check out this TED-Ed video about sperm vs. sperm whales to find out why.

     
  9. 13:00 20th Sep 2013

    notes: 522

    reblogged from: thescienceofreality

    tags: biologybrain

    neuromorphogenesis:

    The Neural Magic of Hypnotic Suggestion

    A new review of the scientific literature studying hypnosis, in the journal Nature Reviews Neuroscience, by Oakley and Halligan, discusses the potential for hypnosis to provide insights into brain mechanisms involved in attention, motor control, pain perception, beliefs and volition and also to produce informative analogues of clinical conditions. This is a critical discussion as hypnosis is used as a psychological treatments and, recently, as an investigative tool in cognitive neuroscience.

    An iconic vision of the menacing magician involves placing a hapless person from the audience into a hypnotic trance. Svengali. You are getting sleeeepy. A scam, right? Not so fast. According to to this new review, as well as our colleagues who study the brains of people who are prone to trancelike states, hypnosis is not necessarily hocus-pocus. The age-old practice profoundly alters neural circuits involved in perception and decision making, changing what people see, hear, feel, and believe to be true. Recent experiments led people who were hypnotized to “see” colors where there were none. Others lost the ability to make simple decisions. Some people looked at common English words and thought they were gibberish.

    Some of the critical experiments were led by Amir Raz, a cognitive neuroscientist at McGill University in Montreal, who is an amateur magician. Raz wanted to do something really impressive that other neuroscientists could not ignore. So he hypnotized people and gave them the Stroop test. In this classic paradigm, you are shown words in block letters that are colored red, blue, green, or yellow. But here’s the rub. Sometimes the word “red” is colored green. Or the word “yellow” is shown in blue. You have to press a button stating the correct color. Reading is so deeply engrained in our brains that it will take you a little bit longer to override the automatic reading of a word like “red” and press a button that says “green.”

    Sixteen people, half of them highly hypnotizable and half of them resistant, came into Raz’s lab. (The purpose of the study, they were told, was to investigate the effects of suggestion on cognitive performance.) After each person underwent a hypnotic induction, Raz gave them these instructions:

    Very soon you will be playing a computer game inside a brain scanner. Every time you hear my voice over the intercom, you will immediately realize that meaningless symbols are going to appear in the middle of the screen. They will feel like characters in a foreign language that you do not know, and you will not attempt to attribute any meaning to them. This gibberish will be printed in one of four ink colors: red, blue, green, or yellow. Although you will only attend to color, you will see all the scrambled signs crisply. Your job is to quickly and accurately depress the key that corresponds to the color shown. You can play this game effortlessly. As soon as the scanning noise stops, you will relax back to your regular reading self.

    Raz then ended the hypnosis session, leaving each person with what is called a posthypnotic suggestion—an instruction to carry out an action while not hypnotized. Days later, they entered the brain scanner.

    In highly hypnotizables, when the instruction came over the intercom, the Stroop effect was obliterated, Raz said. They saw English words as gibberish and named colors instantly. But those who were resistant to hypnosis could not override the conflict, he said. The Stroop effect prevailed, rendering them significantly slower in naming the colors. When the brain scans of the two groups were compared, a distinct pattern appeared. In the hypnotizables, Raz found, the visual area of the brain that usually decodes written words did not become active. And a region in the front of the brain that usually detects conflict was similarly dampened. Top-down processes overrode circuits devoted to reading and detecting conflict. Most of the time people see what they expect to see and believe what they already believe—unless hypnosis trips up their brain circuitry. Most of the time, bottom-up information matches top-down expectation, but hypnosis creates a mismatch. You imagine something different, so it is different.

    The top-down nature of human cognition goes far to explain not only hypnosis but also the extraordinary powers of placebos (a sugar pill will make you feel better), nocebos (a witch doctor can make you ill), talk therapy, meditation, and magical stagecraft. We are not saying that hypnosis can cure your cancer, but these effects all demonstrate that suggestion can physically alter brain function.